Polar bear feeding on a seal carcass, Button Islands, Labrador, Canada, North America

Blue Button (Porpita porpita), Jellyfish with clear cound, blue disc with tentacles extended, Cayman Brac rockpool, Cayman Islands, Caribbean

BLUE DRAGON (Glaucus atlanticus). A small peacic slug that measures only about 2 cm and is generally associated with the Portuguese frigatebird (Physalia physalis) or the blue button (Porpita porpita) on which it feeds. They can also appear in intertidal pools. Marine invertebrates of the Canary Islands, Tenerife.