Hemimysis serrata (Bacescu, 1938)
Common names: Russ: Myzida zubchataya; Ukr: Myzida zubchasta.
Order (Scientific): MYSIDACEA.
Family (Scientific): MYSIDAE.
Taxonomic descriptions: One of 4 species of the genus, three of which are encountered in the Azov-Black Sea basin. Close relative of Hemimysis anomala species. The scale of antenna II is longer than the stalk of antenna I and has 8-12 spicules on its external edge.
World level: EN
Black Sea Regional level: EN
Subregion level: EN (Ukrainian sector)
Distribution: Endemic of the Azov-Black Sea basin. Inhabits the coastal areas of the Sea of Azov, Romanian coastal area of the Black Sea.
Habitats type, Critical habitats, Limiting factors: Photophobic species, inhabiting crevices in rocks and cliffs. The species is euryhaline and eurythermic, very resistant to changes in the saline and temperature regimes. However, more tolerant to increases in salinity.
Biology: Euryphagous, although prefers animal food (polychaetes, crustacean, larvae etc.). Reproduces in the warm part of the year. After fertilization females brood from 7 to 47 (average 33) embryos in the brood pouch. One summer generation. Life span is 14 months. The length of an adult female is 9-11 mm, male - 7-8 mm. Bright red in colour. Nocturnal, only benthic non migrating animals, inhabiting rocky bottom overgrown with algae.
Population trends: Low abundance. Single specimens encountered.
Threats: Anthropogenic influence, in particular pollution of coastal marine zones.
Conservation measures taken: Included in Red Data Books of Ukraine and the Black Sea.
Conservation measures proposed: To protect habitats of species, for example Cape Kazantip (the Sea of Azov, Ukraine).
Compiled by: B.Alexandrov.