Sockeye salmon ocean and live their entire lives in freshwater. Sockeye salmon is the third-most common Pacific salmon species, after pink and chum salmon. "Oncorhynchus" comes from the Greek ὄγκος (onkos) meaning "barb", and ῥύγχος (rhynchos) meaning "snout". "Nerka" is the Russian name for the anadromous form. The name "sockeye" is an anglicization of "suk-kegh" (sθə́qəy̓), its name in Halkomelem, the language of the indigenous people along the lower reaches of the Fraser River (one of British Columbia's many native Coast Salish languages). "Suk-kegh" means "red fish". The sockeye salmon is sometimes called red or blueback salmon, due to its color. Sockeye
Robot fish Robot fish A robot fish is a type of bionic robot, which has the shape and locomotion of a living fish. Since the Massachusetts Institute of Technology first published research on them in 1989, there have been more than 400 articles published about robot fish. According to these reports, approximately 40 different types of robot fish have been built, with 30 designs having only the capability to flip and drift in water. Most robot fish are designed to emulate living fish which use Body-caudal fin (BCF) propulsion. BCF robot fish can be divided into three categories: Single Joint (SJ), Multi-Joint