Prominent among the family Ursidae is a polar bear that is adapted to a highly specialized semi-aquatic lifestyle. Although it is a bear yet it is listed as a marine mammal precisely due to the fact that it spends 50% of its life on ice floes and is able to swim as far as 90 km (60 miles).
urchin. 1  a mischievous boy. 2  any small boy or youngster. 3  sea urchin. 4  either of two small rollers covered with card clothing used in conjunction with the cylinder in carding. 5  Chiefly British Dialect. a hedgehog. 6  Obsolete. an elf or mischievous sprite.
(Back To Top of Page). The Purple Sea Urchin's diet consists of plants, animal matter, including algae, dead fish, sponges, decaying matter, mussels, barnacles, and kelp. The Purple Sea Urchin is the prey of crabs, sunflowers stars, snails, most birds, fish, sea otters, and humans. The Purple Sea Urchin is actually a delicacy in some countries. (Back To Top of Page). The Purple Sea Urchin reproduces by releasing several million jelly coated eggs at a time.