Russian submarine Krab may refer to one of the following submarines:
, a unique submarine of the Russian Imperial Navy; served during World War I; captured by the Germans and handed over to British forces; scuttled by British at Sevastopol in 1919; wreck raised in 1935 and scrapped Russian submarine K-276 Krab, a Sierra I-class nuclear-powered submarine launched for the Soviet Navy in 1986; later renamed B-276 Kostroma; transferred to the Russian Navy upon its creation
ru:Краб (подводная лодка)