AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
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). |
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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". |
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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 (?) |
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 (?) |
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 (?) |
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 (?) |
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 (?) |
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. |
Created by | Romualda Chuševė, 2011-11-03 |
Last update by | Sandra Gečaitė, 2024-08-05 |