Despite this, many anglers use this pier for tope, mackerel, cod, dogfish, mullet and plaice. Dogfish, Mackerel and Tope feed on Shrimp and Whitebait in the estuary. Shrimp, dogfish, mackerel and herring are also abundant in the waters around Vinalhaven. From the "East Shore", bass, dogfish, mackerel and whiting can be caught. Bottom trawlers and sink gillnets are the primary equipment used to harvest spiny dogfish. They do not have any fin spines, unlike the spiny dogfish. Recreational fishing accounts for an insignificant portion of the spiny dogfish harvest. Squaliformes is an order of sharks that includes the smooth dogfish and spiny dogfish. They are an important prey item for sea lions, small cetaceans, and dogfish sharks. In 2010, Greenpeace International added the spiny dogfish to its seafood red list. Somniosus is a widely distributed genus of deepwater dogfish sharks in the family Somniosidae. The spiny dogfish has one of the longest lifespans at more than 100 years. The deepest confirmed report of a shark is a Portuguese dogfish at . Common names include mudfish, mud pike, dogfish, griddle, grinnel, swamp trout and choupique. They are trapped in pots using dogfish and brown crab as bait.