Atlantic Wolffish Anarhichas lupus

The Atlantic Wolffish, also called the Seawolf and Devil Fish (other fish are also called the latter), is native to cold water of the northern Atlantic. They produce a natural "antifreeze" to keep their circulation going in extremely cold temperatures. They are important in their ecosystem by controlling crab and sea urchin populations - which they crush with strong fangs and molar teeth - giving them their "wolf" name. They swim like eels and can grow to nearly 5 feet (1.5 metres) long. They are unusual for fish reproduction in that the eggs are fertilised internally; the male stays to protect the eggs (among the largest for fish eggs) and then the hatchlings for a few months. Atlantic Wolffish are endangered by overfishing and destruction of habitat by trawling the seabed for other catch.