Association with vessel vectors

Actual evidence of being found in samples in a particular vector from any world region.

Anchor and anchor chains. Organisms found on anchors, anchor chain or within attached sediments, including anchor chain lockers.

Ballast water. Ballast water means water with its suspended matter taken on board a ship to control trim, list, draught, stability or stresses of the ship.

Biofouling. Biofouling means the accumulation of aquatic organisms such as micro-organisms, plants, and animals on surfaces and structures immersed in or exposed to the aquatic environment. Biofouling can include microfouling and macrofouling.

  • Macrofouling means large, distinct multicellular organisms visible to the human eye such as barnacles, tubeworms, or fronds of algae.
  • Microfouling means microscopic organisms including bacteria and diatoms and the slimy substances that they produce.
Biofouling comprised of only microfouling is commonly referred to as a slime layer.

Sea chest. The sea chests are cavities (an opening with protection grid) at the bottom side of the ships’ hull (an opening for pumping in and out water for, e.g., ballasting, firefighting) where aquatic organisms may settle and be transported.

Tank sediments. Matter settled out of ballast water within a ship.

Bioaccumulation association

Natural toxins. An organism that accumulates toxins naturally produced by other organisms, such as phytotoxins, in its tissues.

Anthropogenic chemical compounds. An organism that accumulates human-produced chemicals, such as pharmaceuticals, heavy metals, pesticides, dioxins, in its tissues.

Characteristic feeding method

Chemoautotroph. An organism that obtains metabolic energy by oxidation of inorganic substrates such as sulphur, nitrogen or iron.

Deposit feeder – Subsurface. Synonym: detritivore. An organism feeding on fragmented particulate organic matter in the substratum.

Deposit feeder – Surface. Synonym: detritivore. An organism feeding on fragmented particulate organic matter from the surface of the substratum.

Grazer. An organism feeding on plants (higher aquatic plants, benthic algae and phytoplankton) and/or sessile animals organisms.

Herbivore. An organism feeding on plants (higher aquatic plants, benthic algae and phytoplankton).

Mixotroph. An organism both autotrophic and heterotrophic.

Omnivore. An organism feeding on mixed diet of plant and animal material.

Parasite. Feeding on the tissues, blood or other substances of a host.

Photoautotroph. An organism that obtains metabolic energy from light by photosynthesis (e.g. seaweeds, phytoplankton).

Planktotroph. An organism feeding on plankton.

Predator. An organism that feeds by preying on other organisms, killing them for food.

Scavenger. An organism feeding on dead and decaying organic material.

Suspension feeder – Active. An organism feeding on particulate organic matter, including plankton, suspended in the water column, collecting it actively by sweeping or pumping (creating feeding currents).

Suspension feeder – Passive. An organism feeding on particulate organic matter, including plankton, suspended in the water column, utilizing the natural flow to bring particles in contact with feeding structures.

Symbiont contribution. Where some dietary component(s) are provided by symbiotic organisms (e.g. Anemonia with zooxanthellae).

Developmental trait

Brooding. The incubation of eggs either inside or outside the body. Eggs may be brooded to a variety of developmental stages. Males or females may be responsible for brooding.

Direct development. A life cycle lacking a larval stage.

Spawning. The release of gametes into the water.

Lecithotrophy. Development at the expense of internal resources (i.e. yolk) provided by the female.

Parental care. Any form of parental behaviour that is likely to increase the fitness of offspring.

Planktotrophy. Feeding on plankton.

Resting stages. The quiescent stage in the life cycle (dormancy, diapause).

Viviparous. Producing live offspring from within parental body.

Habitat modifying ability potential

Autogenic ecosystem engineers. Organisms which change the environment via their own physical structures (i.e. their living and dead tissues) such as corals, oysters, kelps, sea grasses, etc.

Allogenic ecosystem engineers. Organisms which modify the environment by causing physical state changes in biotic and abiotic materials that, directly or indirectly, modulate the availability of resources to other species (e.g. excavating deep burrows which other organisms co-occupy, damming the water flow, etc).

Keystone species. A keystone species is crucial in maintaining the organization and diversity of its ecological community, by determining the types and numbers of other species.

Life form

Neuston. Organisms that live on (epineuston) or under (hyponeuston) the surface film of water bodies.

Zoobenthos. Animals living on or in the seabed.

Phytobenthos. Algae and higher plants living on or in the seabed.

Zooplankton. Animals living in the water column, unable to maintain their position independent of water movements.

Phytoplankton. Microscopic plankton algae and cyanobacteria.

Benthopelagos. Synonyms: hyperbenthic, benthopelagic, nektobenthic, demersal. An organism living at, in or near the bottom of the sea, but having the ability to swim.

Nekton. Actively swimming aquatic organisms able to move independently of water currents.

Parasite. An organism intimately associated with and metabolically dependent on another living organism (host) for completion of its life cycle.

Symbiont (nonparasitic). An organism living mutually with another species without harming it. Association of two species (symbionts) may be mutually beneficial.

Mobility

Boring. An organism capable of penetrating a solid substrate by mechanical scraping or chemical dissolution.

Burrowing. An organism capable of digging in sediment.

Crawling. An organism moving slowly along on the substrate.

Drifting. An organism whose movement is dependent on wind or water currents.

Permanent attachment. Non-motile; permanently attached at the base. Also includes permanent attachment to a host.

Swimming. An organism capable of moving through the water by means of fins, limbs or appendages.

Temporary attachment. Temporary / sporadic attachment. Attached to a substratum but capable of movement across (or through) it (e.g. Actinia). Also includes temporary attachment to a host.

Native origin

The region the species originates from.

References



References should follow the standard of Biological invasions:


Journal article
Gamelin FX, Baquet G, Berthoin S, Thevenet D, Nourry C, Nottin S, Bosquet L (2009) Effect of high intensity intermittent training on heart rate variability in prepubescent children. Eur J Appl Physiol 105:731-738. doi: 10.1007/s00421-008-0955-8
Ideally, the names of all authors should be provided, but the usage of “et al” in long author lists will also be accepted:
Smith J, Jones M Jr, Houghton L et al (1999) Future of health insurance. N Engl J Med 965:325–329


Article by DOI


Slifka MK, Whitton JL (2000) Clinical implications of dysregulated cytokine production. J Mol Med. doi:10.1007/s001090000086


Book
South J, Blass B (2001) The future of modern genomics. Blackwell, London


Book chapter
Brown B, Aaron M (2001) The politics of nature. In: Smith J (ed) The rise of modern genomics, 3rd edn. Wiley, New York, pp 230-257


Online document
Cartwright J (2007) Big stars have weather too. IOP Publishing PhysicsWeb. http://physicsweb.org/articles/news/11/6/16/1. Accessed 26 June 2007


Dissertation
Trent JW (1975) Experimental acute renal failure. Dissertation, University of California

Reproductive frequency

Iteroparous. Organisms breeding more than once in their lifetime.

Semelparous. Organisms breeding once in their lifetime.

Reproductive type

Asexual. Budding, Fission, Fragmentaion, including parthenogenesis. A form of asexual multiplication in which:
a) a new individual begins life as an outgrowth from the body of the parent. It may then separate to lead an independent existence or remain connected or otherwise associated to form a colonial organism;
b) the ovum develops into a new individual without fertilization;
c) division of the body into two or more parts each or all of which can grow into new individuals is involved.

Self-fertilization. Selfing or autogamy. The union of a male and female gamete produced by the same individual.

Sexual. Permanent hermaphrodite, Protandrous hermaphrodite, Protogynous hermaphrodite, Gonochoristic.
Capable of producing both ova and spermatozoa either at the same time. A condition of hermaphroditism in plants and animals where male gametes mature and are shed before female gametes mature or vice versa.
Having separate sexes.

Salinity

The exact salinity range if known (psu), else salinity zone(s) according to the Venice system:
1. Limnetic [<0.5psu]
2. β-Oligohaline [0.5-3psu]
3. α-Oligohaline [3-5psu]
4. β-Mesohaline [5-10psu]
5. α-Mesohaline [10-18psu]
6. Polymixohaline [18-30psu]
7. Euhaline [30-40psu]
8. Hypersaline [>40psu]

Sociability

Colonial. Descriptive of organisms produced asexually which remain associated with each other; in many animals, retaining tissue contact with other polyps or zooids as a result of incomplete budding.

Gregarious. Organisms living in groups or communities, growing in clusters.

Solitary. Living alone, not gregarious.

Sub-species level

A geographical subset of a species showing discrete differences in morphology, coloration or other features when compared with other members of the species. Subspecies may also differ in their habitat or behavior, but they can interbreed. Often the lowest taxonomic level within a classification system.

Synonym

Valid synonyms of a species (not all of them).

Toxicity

Poisonous. An organism capable of producing poison that gains entry to another organism body via the gastrointestinal tract, the respiratory tract, or via absorption through intact body layers.

Venomous. An organism capable of producing poison, usually injected through another organism intact skin by bite or sting.

Not relevant. Neither poisonous nor venomous.

Public domain: Species account

Species Cassiopea andromeda [WoRMS]
Authority (Forskål, 1775)

References (not structured):
Hofmann DK, Fitt W et al (1996) Checkpoints in the life-cycle of Cassiopea spp.: control of metagenesis and metamorphosis in a tropical jellyfish. International Journal of Developmental Biology 40: 331-338

Comments:
the article says yhat the jellyfish Cassiopea andromeda was first described as Medusa andromeda by Forskal from Thor at the Red Sea in 1775 and later on transferred to the genus Cassiopea by Eschscholtz in 1829 (see Gohar and Eisawy, 1960a, for references) (article not available).
Family Cassiopeidae  
Order Rhizostomeae  
Class Scyphozoa  
Phylum Cnidaria  
Synonym (?) Cassiopea medusa
Cassiopea mertensii
Cassiopea xamachana

References (not structured):
Neumann R (1979) Bacterial induction of settlement and metamorphosis in the planula larvae of Cassiopea andromeda (Cnidaria: Scyphozoa, Rhizostomeae) Mar Ecol Prog Ser 1: 21-28
Hofmann DK, Fitt W et al (1996) Checkpoints in the life-cycle of Cassiopea spp.: control of metagenesis and metamorphosis in a tropical jellyfish. International Journal of Developmental Biology 40: 331-338
Eldredge LG, Smith C (2001) A guidebook of introduced marine species in Hawaii, Bishop Museum and the Univ. of Hawai'i
Holland BS, Dawson MN et al (2004) Global phylogeography of Cassiopea (Scyphozoa: Rhizostomeae): molecular evidence for cryptic species and multiple invasions of the Hawaiian Islands. Marine Biology 145(6): 1119-1128
This articles referes to unavailable texts:
Gohar HAF, Eisawy AM (1960) The biology of Cassiopea andromeda (from the Red Sea) (With a note on the species problem). Publ Mar Biol Stat Ghardaqa 11:3–39
Hummelinck PW (1968) Caribbean scyphomedusae of the genus Cassiopea. studies of fauna of Curac¸ao and other Caribbean Islands 23:1131–1143
Hofmann DK, Hadfield MG (2002) Hermaphroditism, gonochorism, and asexual reproduction in Cassiopea sp.—an immigrant in the islands of Hawai‘i. Invertebr Reprod Dev 41:215–221

Comments:
There is a remarkable controversy regarding Cassiopea spp. that has been described along these articles. Some suggest that C. xamachana don’t represent a separate species but only a geographic variation of C. andromeda (articles 1 and 2). In article 3 and 4 it is said that Cassiopea andromeda has been reported from Hawaii (O’ahu) in two separated names Cassiopea medusa (Light 1914) and Cassiopea mertensii (Brandt 1835). Finally in article 4 it is suggested that six nominal species of “upside down jellyfish” (common name) that have been described from the Pacific can be currently placed in C. andromeda, although “the systematics of Cassiopea warrants reappraisal".
Sub-species level (?) Not entered
Native origin (?) LME: 33. Red Sea
--> LME sub-region: Southeast Red sea

References (not structured):
Holland BS, Dawson MN et al (2004) Global phylogeography of Cassiopea (Scyphozoa: Rhizostomeae): molecular evidence for cryptic species and multiple invasions of the Hawaiian Islands. Marine Biology 145(6): 1119-1128.
Galil B, Spanier E et al (1990) The Scyphomedusae of the Mediterranean coast of Israel, including two Lessepsian migrants new to the Mediterranean. Zoologische Mededelingen (Leiden) 64(7): 95-105.
Katsanevakis S (2011) Rapid assessment of the marine alien megabiota in the shallow coastal waters of the Greek islands, Paros and Antiparos, Aegean Sea. Aquatic Invasions 6(1): S133-S137
Eldredge LG, Smith C (2001) A guidebook of introduced marine species in Hawaii, Bishop Museum and the Univ. of Hawai'i.
Schembri PJ, Deidun A et al (2010) First record of Cassiopea andromeda (Scyphozoa: Rhizostomeae: Cassiopeidae) from the central Mediterranean Sea. Marine Biodiversity Records 3(1).

Comments:
The philogeography of Cassiopea spp. is controversial; being suggested the origin of C. andromeda in the Indo-Pacific (articles 3 and 4) surrounded by confusion and disagreement. After reviewing molecular data, it is believed in the article 1 and 5, that the Red Sea/leeward-O’ahu/Moloka’i/western-Atlantic clade most probably represents C. andromeda, which originally was described from the Red Sea. In the article 2 it is also suggested that C. andromeda is the first known Scyphomedusa migrant from the Red Sea into the Mediterranean. Afterwards, the first record of C. andromeda in the Mediterranean was obtained from Cyprus, by Maas (1903: 42)
Life form / Life stage (?)
 AdultJuvenileLarvaeEggsResting stage
Neuston
ZoobenthosX
Phytobenthos
ZooplanktonX
Phytoplankton
BenthopelagosX
Nekton
Ectoparasite
Endoparasite
Symbiont (non parasitic)


References (not structured):
1- Hofmann, D. K., W. Fitt, et al. (1996). "Checkpoints in the life-cycle of Cassiopea spp.: control of metagenesis and metamorphosis in a tropical jellyfish." International Journal of Developmental Biology 40: 331-338.

2- WoRMS database - taxon details

3- Neumann, R. (1979). "Bacterial induction of settlement and metamorphosis in the planula larvae of Cassiopea andromeda (Cnidaria: Scyphozoa, Rhizostomeae)." Mar Ecol Prog Ser 1: 21-28.

4- Schembri, P. J., A. Deidun, et al. (2010). "First record of Cassiopea andromeda (Scyphozoa: Rhizostomeae: Cassiopeidae) from the central Mediterranean Sea." Marine Biodiversity Records 3(1).

5- Stoner, E. W., C. A. Layman, et al. (2011). “Effects of anthropogenic disturbance on the abundance and size of epibenthic jellyfish Cassiopea spp.” Marine pollution bulletin.

Comments:
The literature refers to the medusa stage as benthopelagic, as normaly lies upside down in the bottom but it can swim (reference 2 and 5). Its habiat is normaly muddy-sand bottoms. C. andromeda releases fustules or swimming buds (larvae), also motile pelagic or bentho-pelagic, when reproducing sexually (article 4). The larvae show morphological and physiological polarity and swim with the blunt end ahead. This larvae or plastula settles in a suitable substratum and attaches irreversibly at their blunt anterior end, starting its metamorphose into the benthic polyp stage (considered as the juvenile stage) which is sessile (article 1).
The eggs develop froming a mass, enveloped in mucus and wrapped around the bases of sex specific vesicles within the oral discs of the female medusa stage until they deveop into the plantula stage. (article 1 and 3).
Sociability / Life stage (?)
 AdultJuvenileLarvaeEggsResting stage
SolitaryXXX
GregariousXX
Colonial


References (not structured):
Schembri PJ, Deidun A et al (2010) "First record of Cassiopea andromeda (Scyphozoa: Rhizostomeae: Cassiopeidae) from the central Mediterranean Sea." Marine Biodiversity Records 3(1).
Katsanevakis S (2011) "Rapid assessment of the marine alien megabiota in the shallow coastal waters of the Greek islands, Paros and Antiparos, Aegean Sea." Aquatic Invasions 6(1): S133-S137
Hofmann D K, Fitt W et al (1996) "Checkpoints in the life-cycle of Cassiopea spp.: control of metagenesis and metamorphosis in a tropical jellyfish." International Journal of Developmental Biology 40: 331-338.
Neumann R (1979) "Bacterial induction of settlement and metamorphosis in the planula larvae of Cassiopea andromeda (Cnidaria: Scyphozoa, Rhizostomeae)." Mar Ecol Prog Ser 1: 21-28

Comments:
Either the adults, the juveniles (polyps) or the larvae can be found individualy, although in the articles 1 and 2, the adults of C. andromeda were spoted an described as an aggregation .
The eggs develop froming a mass, enveloped in mucus and wrapped around the bases of sex specific vesicles within the oral discs of the female medusa stage until they deveop into the plantula stage (articles 3 and 4).
Reproductive frequency (?) Iteroparous

References (not structured):
Hofmann D K, Fitt W et al (1996) "Checkpoints in the life-cycle of Cassiopea spp.: control of metagenesis and metamorphosis in a tropical jellyfish." International Journal of Developmental Biology 40: 331-338.

Comments:
The species is known to be able of reproducting more than once along their live cycles.
Reproductive type (?) Asexual
Sexual

References:
Hofmann D K, Fitt W et al (1996) "Checkpoints in the life-cycle of Cassiopea spp.: control of metagenesis and metamorphosis in a tropical jellyfish." International Journal of Developmental Biology 40: 331-338.
Eldredge LG, Smith C (2001) A guidebook of introduced marine species in Hawaii, Bishop Museum and the Univ. of Hawai'i.

3- Neumann, R. (1979). "Bacterial induction of settlement and metamorphosis in the planula larvae of Cassiopea andromeda (Cnidaria: Scyphozoa, Rhizostomeae)." Mar Ecol Prog Ser 1: 21-28.

4- Hofmann, D. and T. Honegger (1990). "Bud formation and metamorphosis inCassiopea andromeda (Cnidaria: Scyphozoa): A developmental and ultrastructural study." Marine Biology 105(3): 509-518.

Comments:
Cassiopea andromeda displays a metagenetic life cycle which is typical for the scyphozoans: scyphopolyps, representing the vegetative generation, produce medusae of separate sexes by means of monodiscous strobilation. Temperature has been shown in laboratory experiments to be an environmental factor involved in strobilation control in C. andromeda. Medusae reproduce sexually and eggs develop within the oral discs of the females. This jellyfish is dioecious, an adult female individual produces eggs and holds them until a male jellyfish releases sperm into the water. The female uses her arms and tentacles to gather sperm from the water to fertilize the eggs.
In the next stage, ciliated planula larvae are released. This type of larva-like swimming bud is exclusively found in species of the order rhizostomea, and they remain in morphogenetic stasis unless induced to metamorphose. After that, they settle and undergo metamorphosing into scyphistomae (polyp). In addition, scyphistomae reproduce asexually by spindle shaped buds in the lower region of the polyp's head. After separation, the motile buds settle on suitable substrate and transform into new polyps.
The strobilation occurs due to a progressive constriction of the calyx, the upper tentacle bearing portion becomes separated and is transformed into a single medusa, the ephyra , within about one week. The remaining basal polyp regenerates the lost tentacular and hypostomal region, resumes feeding and may strobilate again.
Polyp formation from sexually produced larvae is the dominant pathway.
Developmental trait (?) Brooding
Spawning

References:
Hofmann D K, Fitt W et al (1996) "Checkpoints in the life-cycle of Cassiopea spp.: control of metagenesis and metamorphosis in a tropical jellyfish." International Journal of Developmental Biology 40: 331-338.
Eldredge LG, Smith C (2001) A guidebook of introduced marine species in Hawaii, Bishop Museum and the Univ. of Hawai'i.
Neumann R (1979) "Bacterial induction of settlement and metamorphosis in the planula larvae of Cassiopea andromeda (Cnidaria: Scyphozoa, Rhizostomeae)." Mar Ecol Prog Ser 1: 21-28

Comments:
Male individuals release their gametes (sperm) into the water, which is attracted by female jellyfish with their tentacles in order to fertilice the eggs.
In female individuals, masses of eggs or embryos are enveloped in mucus and wrapped around the bases of sex specific vesicles in the center of the oral disk. This simple mode of brood protection lasts until ciliated planula larvae hatch from the egg envelopes.
Characteristic feeding method / Life stage (?)
 AdultJuvenileLarvaeEggsResting stage
Photoautotroph
Mixotroph
Suspension feeder – Active
Suspension feeder – PassiveXX
Deposit feeder – Surface
Deposit feeder – Sub-surface
Omnivore
Herbivore
Scavenger
Symbiont contributionXX
Planktotroph
Chemoautotroph
Predator
Grazer


References (not structured):
Eldredge LG, Smith C (2001) A guidebook of introduced marine species in Hawaii, Bishop Museum and the Univ. of Hawai'i.
Hofmann D K, Fitt W et al (1996) "Checkpoints in the life-cycle of Cassiopea spp.: control of metagenesis and metamorphosis in a tropical jellyfish." International Journal of Developmental Biology 40: 331-338.
Enciclopedia of Life.
Hale G (1999)"The Classification and Distribution of the Class Scyphozoa."
Rahat M, Hofmann D (1987) Bacterial and Algal Effects on Metamorphosis in the Life Cycle of Cassiopea andromedaa. Annals of the New York Academy of Sciences 503(1): 449-458
Stoner EW, Layman CA et al (2011) Effects of anthropogenic disturbance on the abundance and size of epibenthic jellyfish Cassiopea spp. Marine pollution bulletin.

Comments:
Cassiopea andromeda feeds in drifting zooplankton. It can eat small animals or just pieces of them after they are paralyzed with its mucous and nematocysts, which are placed in both its epidermis and gastrodermis and are used for protection and capturing food. The food is carried to one of their many secondary mouths by canals in the arms. These arms then open to the stomach.
The principal food imput is provided by the photosynthetic dinoflagellate algae, the Zooxanthellae, that lives in symbiotic relationship with C. andromeda.The Zooxanthellae live in the tissues of the ventral surface of its body and it is the responsible for its coloration. The Zooxantella provides food for the jellyfish in exchange for sunlight, that is necessary for the photosynthetic dinoflagellate algae. That is the reason why C. andromeda is normaly placed upside down, as it is known by its common name.
Polyps feed on plankton and only after the formation of the oral opening it is possible to acquire the algal symbionts.
Mobility / Life stage (?)
 AdultJuvenileLarvaeEggsResting stage
SwimmerX
Crawler
Burrower
Drifter
Temporary attachment
Permanent attachmentXX
Borer


References (not structured):
WoRMS database - taxon details
Schembri PJ, Deidun A et al (2010) "First record of Cassiopea andromeda (Scyphozoa: Rhizostomeae: Cassiopeidae) from the central Mediterranean Sea." Marine Biodiversity Records 3(1)
Hofmann DK, Fitt W et al (1996) "Checkpoints in the life-cycle of Cassiopea spp.: control of metagenesis and metamorphosis in a tropical jellyfish." International Journal of Developmental Biology 40: 331-338

Comments:
The medusae stage normaly lies upside down in the bottom but it can swim. The polip is permanently attached to a substrate and the larvae (plastula) is freely reseased , being motile pelagic. The eggs are permanently attached to the oral disc of female individuals.
Salinity tolerance range (?) Exact range: 0 - 36

References:
Béziat, P., Kunzmann, A. 2022. Under pressure: Cassiopea andromeda jellyfish exposed to increasing water temperature or lead, cadmium and anthropogenic gadolinium contamination. Marine Biology Research, 18(1-2), pp. 48-63.

Comments:
Cassiopea thriving in a variety of environmental conditions, including large variations in salinity (0–36 PSU) and dissolved oxygen (7.01–15.56 mg/l).
Habitat modifying ability potential (?) Unknown
Toxicity / Life stage (?)
 AdultJuvenileLarvaeEggsResting stage
VenomousXX
Poisonous


References:
Radwan FFY, Burnett JW et al (2001) "A comparison of the toxinological characteristics of two Cassiopea and Aurelia species." Toxicon 39(2-3): 245-257
Eldredge LG, Smith C (2001) A guidebook of introduced marine species in Hawaii, Bishop Museum and the Univ. of Hawai'i.
Özgür E, Öztürk B (2008) "A population of the alien jellyfish, Cassiopea andromeda (Forsskål, 1775)[Cnidaria: Scyphozoa: Rhizostomea] in the Ölüdeniz Lagoon, Turkey." Aquatic Invasions 3(4): 423-428
Öztürk B, İşinibilir M "An alien jellyfish Rhopilema nomadica and its impacts to the Eastern Mediterranean part of Turkey Yabancı denizanası Rhopilema nomadica ve Türkiye’nin doğu Akdeniz sahillerine etkileri."

Comments:
The nematocist of the C. andromeda are described as venomous , and was associated with mouse lethaly in lab experiments. It is also described as a nuisance species, as they can sting people, resulting in skin welts, skin
rash, itching, vomiting and skeletal pains depending on the individuals sensitivity to the toxin of the nematocysts.
In high abundances they are consider of great concern as it may annoy bathers and impact tourism.
Bioaccumulation association (?) Anthropogenic chemical compounds

References:
Béziat, P., Kunzmann, A. 2022. Under pressure: Cassiopea andromeda jellyfish exposed to increasing water temperature or lead, cadmium and anthropogenic gadolinium contamination. Marine Biology Research, 18(1-2), pp. 48-63.
Known human health impact? Known

References:
Özgür, E., Öztürk, B. 2008. A population of the alien jellyfish, Cassiopea andromeda (Forsskål, 1775)[Cnidaria: Scyphozoa: Rhizostomea] in the Ölüdeniz Lagoon, Turkey. Aquatic Invasions, 3(4), pp. 423-428.

Comments:
The high abundance of the species in the Ölüdeniz Lagoon and along the Turkish coast is of great concern as it may annoy bathers and impact tourism.
Known economic impact? Not known

Comments:
Not available.
Known measurable environmental impact? Known

References:
Cillari, T., Allegra, A., Berto, D., Bosch-Belmar, M., Falautano, M., Maggio, T., ... Castriota, L. 2022. Snapshot of the distribution and biology of alien jellyfish Cassiopea andromeda (Forsskål, 1775) in a Mediterranean Touristic Harbour. Biology, 11(2), 319.

Comments:
C. andromeda is a perfect invader thanks to
its nutritional strategy and capacity to adapt to heavily anthropized areas. Therefore, its potential impact on the local biodiversity and thus on the ecosystem’s structure and functioning is worth considering.
Included in the Target Species list? No

References:
HELCOM, 2009. Alien Species and Ballast Water [PDF] Available at: https://archive.iwlearn.net/helcom.fi/stc/files/shipping/Table_2_Alienspecies_%20lists_2009.pdf [Accessed 1 July 2024].
Association with vessel vectors (?) Ballast waters

References:
Cillari, T., Allegra, A., Berto, D., Bosch-Belmar, M., Falautano, M., Maggio, T., ... Castriota, L. 2022. Snapshot of the distribution and biology of alien jellyfish Cassiopea andromeda (Forsskål, 1775) in a Mediterranean Touristic Harbour. Biology, 11(2), 319.
Molecular information Available

Enciclopedia of Life, refers to Barcode of Lefe Data System (BOLD) and GenBank (http://eol.org/data_objects/12402084)

Comments:
In the reference it can be found the representative barcode sequence, the centroid of all available sequences for this species, as well as a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.
Created byRomualda Chuševė, 2011-11-03
Last update bySandra Gečaitė, 2024-08-05