Biological notes on the Pacific sleeper shark, Somniosus Pacificus (Chondrichthyes soualidae)
Information was obtained on the Pacific sleeper shark, Somniosus pacificus Bigelow and Schroeder, 1944, along the California coast from fishermen who caught specimens incidentally in sablefish traps and trawls. Morphometric and tooth-count data were taken from several specimens. An estimate of fecundity was based on one specimen with 372 yellow, vascularized, ovarian eggs. The approximate size at marurity was determined using gonadal development and a length-weight curve. Pacific sleeper sharks are considered sluggish, bottom-dwelling, cephalopod and fish feeders, yet they may occasionally consume fast swimming epipelagic fish.