This crustacean is known from Japan, eastern Russia, eastern China, southwestern France and California, USA, among other areas.
Adults have seven pairs of legs.
It lives in shallow-water marinas and fouling communities.
In adults, the first five abdominal segments are fused along the middle of the back but remain distinct at the sides.
In adults, the mouthparts form a forward-pointing cone below the head.
An extinction-risk assessment has not been added yet.