Lithodidae Dromiidae Atelecyclidae Cancridae Pirimelidae Cheiragonidae Dorippidae Eriphiidae Epialtidae Inachidae Oregoniidae Pilumnidae Geryonidae Portunidae Potamidae Panopeidae Xanthidae Grapsidae Images Name list Publications Sites alex@equator.ru Whole checklist По-русски (in Russian) Porcellanidae Varunidae Camptandriidae Macrophthalmidae Pinnotheridae Hapalogastridae Plagusiidae Far East / North Pacific Black Sea Baltic Sea Freshwater crabs Arctic Ocean Designed and composed by Alex Alyakrinsky, 2011 Panopeidae Rhithropanopeus harrisii (Gould, 1841) = Rhithropanopeus harrisii tridentatus Maitland, 1874 Black Sea, Baltic Sea, Caspian Sea It inhabits Sea of Azov, very common. Since 1957 it became invader of Caspian Sea.   Euryhaline species. It inhabits sand and sand-mud bottoms; usually bury itself in bottom. Due  to sedentary life it often has encrustations of hydroids and barnacles.  Size of carapace. Up to 20 mm.  [Kobjakova & Dolgopolskaya, 1969, p. 296].