AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Cuthona perca | |
Authority | (Marcus Er., 1958) | |
Family | Tergipedidae | |
Order | Nudibranchia | |
Class | Gastropoda | |
Phylum | Mollusca | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Not entered Comments: Tropical Pacific, NE Pacific, Tropical Atlantic, SW Atlantic |
Life form / Life stage (?) |
References (not structured): Martynov, A. V., Korshunova, T. A., Grintsov, V. A. 2007. Opisthobranch molluscs of the Northern Black Sea. I. Short history of studies and the first record of a non-indigenous nudibranch species Trinchesia perca (Er. Marcus, 1958)(Nudibranchia: Tergipedidae). Ruthenica, 17(1–2), pp. 43-54. Comments: C. perca is a slender nudibranch which tapers posteriorly. C. perca lays its eggs in a kidney-shaped mass, containing about 100 eggs, fastened to a substrate by a stalk. Larvae are planktonic for a few days. |
Sociability / Life stage (?) |
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Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Sexual References: Martynov, A. V., Korshunova, T. A., Grintsov, V. A. 2007. Opisthobranch molluscs of the Northern Black Sea. I. Short history of studies and the first record of a non-indigenous nudibranch species Trinchesia perca (Er. Marcus, 1958)(Nudibranchia: Tergipedidae). Ruthenica, 17(1–2), pp. 43-54. Comments: Nudibranchs are simultaneous hermaphrodites and copulate reciprocally or unilaterally. C. perca lays its eggs in a gelatinous mass, attached to a hard substrate. Unhatched veligers rotate inside the eggs which is characteristic of planktotrophic veligers. In Brazil, eggs hatched in 8 days at 23-25°C. |
Developmental trait (?) | Brooding References: Martynov, A. V., Korshunova, T. A., Grintsov, V. A. 2007. Opisthobranch molluscs of the Northern Black Sea. I. Short history of studies and the first record of a non-indigenous nudibranch species Trinchesia perca (Er. Marcus, 1958)(Nudibranchia: Tergipedidae). Ruthenica, 17(1–2), pp. 43-54. Comments: C. perca were mature, actively copulated and laid kidney-shaped off-white egg-masses. Numerous egg-masses of C. perca were found under the stones as well. |
Characteristic feeding method / Life stage (?) |
References (not structured): Martynov, A. V., Korshunova, T. A., Grintsov, V. A. 2007. Opisthobranch molluscs of the Northern Black Sea. I. Short history of studies and the first record of a non-indigenous nudibranch species Trinchesia perca (Er. Marcus, 1958)(Nudibranchia: Tergipedidae). Ruthenica, 17(1–2), pp. 43-54. Comments: Many nudibranchs which feed on cnidarians, ingest the nematocysts and incorporate them into their cerata as a defensive mechanism. C. perca was reported to feed on sea anemones. |
Mobility / Life stage (?) |
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Salinity tolerance range (?) | Exact range: 18 - 35 References: Yokes, M. B., Andreou, V., Bakiu, R., Bonanomi, S., Camps, J., Christidis, G., ... Vannucci, A. 2018. New Mediterranean Biodiversity Records (November 2018). Mediterranean Marine Science, 19(3), pp. 673-689. Smithsonian Environmental Research Center (2024) Cuthona perca (Lake Merritt Aeolis). Available at: https://invasions.si.edu/nemesis/species_summary/-55 (Accessed: 7 August 2024). Comments: C. perca clearly prefers waters with lowered salinity. |
Habitat modifying ability potential (?) | Unknown Comments: Not available. |
Toxicity / Life stage (?) | Not relevant Comments: C. perca, like many nudibranchs, is neither poisonous nor venomous. Instead, it employs a form of chemical defense by incorporating nematocysts (stinging cells) from its prey, typically hydroids, into its own tissues. This provides a defense mechanism against predators. |
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 Comments: 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 Biofouling References: Martynov, A. V., Korshunova, T. A., Grintsov, V. A. 2007. Opisthobranch molluscs of the Northern Black Sea. I. Short history of studies and the first record of a non-indigenous nudibranch species Trinchesia perca (Er. Marcus, 1958)(Nudibranchia: Tergipedidae). Ruthenica, 17(1–2), pp. 43-54. Comments: C. perca is potentially transported in fouling and ballast water, and tolerates a wide range of temperature and salinity. |
Molecular information | Not available |
Last update by | Sandra Gečaitė, 2024-08-07 |