Malacostraca | Decapoda
Ray, G.L. 2005. (Ref. 3159)
Size / Weight / Age
Max length : 7.5 cm CW male/unsexed; (Ref. 3159)
Benthic; freshwater; brackish; depth range 0 - 25 m (Ref. 81172)
Climate / Range
Temperate; 5°C - 27°C (Ref. 8003); 44°N - 21°N, 112°E - 135°E
Northwest Pacific: Native from Valdivostok Russia, to the west coast of North Korea south to Hong Kong, China. Introduced to central and western Europe.
Catadromous (Ref. 101972). Maximum depth from Ref. 104445. Found in coastal rivers and estuaries. It needs brackish or saltwater to reproduce (Ref. 8778). From sublittoral sediment and surface running water (Ref.). Predominantly omnivorous; however, it exhibits plasticity in its diet (i.e. feeding habits may shift throughout the cycle). Likely to scavenge and feed on detritus. Shifts to a more carnivorous diet as it ages, eating shrimp and other benthic invertebrates. Also reported to feed on fish captured in fishing nets. Has high affinity to burrow. Juveniles are known to form burrows between high and low tide lines upon migration into brackish waters (Ref. 104191). Feeds on periphytic algae, terrestrial plants, detritus, sand, copepods and chironomid larvae (Ref. 107018). Life cycle: Eggs are carried until hatched and the adults die afterwards. The larvae undergo five zoeal stages. Juveniles migrate from the estuary to the freshwater to develop into adults. Adults migrate downstream, mating occurs in saline water (Ref. 8003).
IUCN Red List Status (Ref. 114614)
CITES status (Ref. 94142)
Threat to humans
FAO(Aquaculture: production, fisheries: production) | FisheriesWiki | Sea Around Us
Estimation of some characteristics with mathematical models
Low vulnerability (10 of 100)