The population dynamics and resource partitioning of five species of spider crabs (Loxorhynchus crispatus, Pugettia producta, Mimulus foliatus, Pugettia richii, and Scyra acutifrons) were measured in a kelp forest on the central California coasts. The

The larvae of Scyra acutifrons are described and illustrated for the first time. The larval stage consists of two zoeal and a megalopal stages. The zoea of S. acutifrons is compared with those of other known species of the Epialtidae from the northern

The sharp-nosed crab Scyra compressipes Stimpson, 1857 (Brachyura: Epialtidae: Pisinae) is collected in coastal waters of the Habomai Islands (the southern Kuril Islands) at the depth of 18–24 meters. The species was recorded in the Russian waters for