Malacostraca | Decapoda
Holthuis, L.B. 1991. (Ref. 4)
Size / Weight / Age
Max length : 9.5 cm BL male/unsexed; (Ref. 4)
Climate / Range
Subtropical; 48°N - 30°N, 117°E - 153°E (Ref. 4)
Northwest Pacific: S.E. coast of Siberia, USSR, from Olga Bay southward, Korea, N. China, Kuril Islands, Japan.
Rostrum ending in 3 teeth, the lateral at the end of a ridge that is separated from the central part of the rostrum by a deep groove; a shallow median longitudinal groove is present in the central part. The lower surface of the rostrum has no spines. Anterolateral border of carapace with a single spine at the level of the eye. First pereiopods subchelate. Dactylus of adult male with 9 to 11 oblique ridges on the outer surface, and with a low tooth in the proximal half of the cutting edge. Two denticulate ridges on the upper surface of the palm. Merus of the first pereiopod with a distinct subdistal anterodorsal spine; coxa of that leg with a spine (Ref. 4).
It has a maximum total body length of 9.5 cm (Ref. 4). It is found in tidal mud flats and it makes Y-shaped burrows in the mud and are filter feeders (Ref. 4). Members of the order Decapoda are mostly gonochoric. Mating behavior: Precopulatory courtship ritual is common (through olfactory and tactile cues); usually indirect sperm transfer (Ref. 833).
IUCN Red List Status (Ref. 114614)
CITES status (Ref. 94142)
Threat to humans
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Estimation of some characteristics with mathematical models
Low vulnerability (10 of 100)