Lovund also has a well-known colony of puffins. Otters are very common along the coast and fjords, as is harbour porpoise, harbour seals; there are also seals. The largest fish in the sea is the basking shark, which were hunted in earlier days. The character birds along the coast, common in all areas including the fjords, are sea gulls, Eurasian oystercatcher and Arctic terns, and the grey heron has also become common. The Eurasian eagle-owl has a stronghold along the Helgeland coast; predator birds like golden eagle, gyrfalcon and peregrine falcon nest in some inaccessible areas. Orcas are common along the coast and in the Vestfjord area (even in the fjords) in winter, and the world's largest predator, the sperm whale, hunt for prey in the deep waters west of Andøya. Tysfjord and Folda fjord is home to the world's northernmost lobster population.