AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Haliclystus salpinx [WoRMS] | |
Authority | James-Clark, 1863 | |
Family | Haliclystidae | |
Order | Stauromedusae | |
Class | Staurozoa | |
Phylum | Cnidaria | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Not entered Comments: Pacific Ocean Antlantic Ocean |
Life form / Life stage (?) |
References (not structured): Mills, C.E. and Hirano, Y.M., 2007. Staurozoa (Cnidaria): A review of its biology and ecology. Available at: https://faculty.washington.edu/cemills/Mills&Hirano2007bStauro.pdf [Accessed 11 August 2024]. Comments: Laboratory studies indicate that the eggs are sticky and probably remain on the bottom very near the parent stauromedusae. The externally-fertilized embryos develop into microscopic, wormlike, unciliated, planula larvae. |
Sociability / Life stage (?) |
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Reproductive frequency (?) | Not known Comments: Not available. |
Reproductive type (?) | Sexual References: Otto, J. J. 1976. Early development and planula movement in Haliclystus (Scyphozoa: Stauromedusae). In Coelenterate ecology and behavior, pp. 319-329. Comments: The Stauromedusae are dioecious. An animal has 8 gonads, each consisting of a group of gonadal sacs arranged along the interradial septa. In sexually mature animals all the gonadal sacs contain gametes ready to be released. The gametes are released into the gastric cavity and are then expelled through the animal's mouth. Stauromedusae reach adult sizes, typically about to centimeters in length or calyx diameter, within several weeks. Like most other medusae, they seem to put most energy into growth until they reach near-adult size, at which point energy is allocated primarily to the production of eggs and sperm for sexual reproduction. |
Developmental trait (?) | Spawning References: Otto, J. J. 1976. Early development and planula movement in Haliclystus (Scyphozoa: Stauromedusae). In Coelenterate ecology and behavior, pp. 319-329. Comments: The sexes are separate, and, given enough to eat, most stauromedusae apparently spawn daily for a month or more, until conditions deteriorate and they die. |
Characteristic feeding method / Life stage (?) |
Comments: Stauromedusae eat mostly small crustaceans—primarily harpacticoid copepods, gammarid amphipods, chironomid fly larvae, and ostracods, with some species also feeding on small polychaetes (worms) and snails. Stauromedusae are able to capture prey from the plankton as well as on the bottom. |
Mobility / Life stage (?) |
References (not structured): Otto, J. J. 1976. Early development and planula movement in Haliclystus (Scyphozoa: Stauromedusae). In Coelenterate ecology and behavior, pp. 319-329. Comments: Found commonly on eelgrass, rock, and algae. Stauromedusae are seen floating freely in the water. |
Salinity tolerance range (?) | Unknown References: Mills, C.E. and Hirano, Y.M., 2007. Staurozoa (Cnidaria): A review of its biology and ecology. Available at: https://faculty.washington.edu/cemills/Mills&Hirano2007bStauro.pdf [Accessed 11 August 2024]. Comments: These animals are found in full-salinity ocean waters along exposed to fairly protected coastlines; some are found in estuaries with slightly lowered salinities. |
Habitat modifying ability potential (?) | Unknown Comments: Not available. |
Toxicity / Life stage (?) |
References: Mills, C.E. and Hirano, Y.M., 2007. Staurozoa (Cnidaria): A review of its biology and ecology. Available at: https://faculty.washington.edu/cemills/Mills&Hirano2007bStauro.pdf [Accessed 11 August 2024]. Comments: Each arm is crowned with a cluster of small hollow tentacles, each with a terminal knob covered with cnidocysts—the “stinging cells” that cnidarians use to capture prey. |
Bioaccumulation association (?) | Unknown Comments: Not available. |
Known human health impact? | Not known Comments: Not available. |
Known economic impact? | Not known Comments: Not available. |
Known measurable environmental impact? | Not known Comments: Not available. |
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 (?) | Unknown Comments: Not available. |
Molecular information | Not available |
Created by | Aleksas Narščius, 2019-01-30 |
Last update by | Sandra Gečaitė, 2024-08-12 |