The fin whale has a long and slender body which can grow to lengths of more than 20 meters. The body of the fin whale is generally blue or gray in color and slighter lighter on the underside of the fin whale.
The fin whale is a carnivorous animal, that feeds by filtering food out of the water using the specially designed plates in its mouth (like a blue whale). The fin whale eats fish, krill, plankton, squid and crustaceans by simply opening its enormous mouth and swimming at faster speeds.
Due to its sheer size, the fin whale has no real predators within its natural environment as ocean predators simply don't compare in size. Humans are the greatest threat to the fin whale, as they have been hunted over the years to near extinction. The new-born fin whale calves are also sometimes attacked by large sharks.
Fin whales breed in the cold winter months, after which the female fin whales migrate south to the warmer, safer waters where she can nurse her young. The fin whale calf is born after a gestation period last is nearly a year long, and feeds on his mothers milk until he is around 7 months old and able to start hunting in the water.