According to National Geographic, blue whales feed on tiny, shrimp-like organisms called krill. A blue whale can consume up to 4 tons of krill each day. More »

Blue whale calves are born after gestation periods of 10 to 12 months. They nurse for 6 to 7 months, and the total calving period is 2 to 3 years. Blue whales reach sexual maturity at 5 to 15 years of age. The exact life... More »

The blue whale feeds on small organisms called copepods and krill. It eats by sucking in a mouthful of water and krill and then filtering out the water through its baleen bristle teeth. More »

Plankton exist near the bottom of the ocean's food chain and provide nutrition for whales, shrimp, snails and jellyfish. Plankton also play an important role in the carbon cycle by removing inorganic carbon dioxide due t... More »

In cetaceans, the order that includes all whales, dolphins and porpoises, females are called cows. Males are called bulls, and their offspring are called calves. Calves remain with their mothers for up to two years, depe... More »

A baby blue whale weighs as much as three tons at birth and is 25 feet long. The mother blue whale nurses her calf for at least a year, and the calf gains 200 pounds a day during that time. More »

When organisms die in an ocean biome, they are decomposed by bacteria like on land and become food for scavengers, such as sharks and crabs. Unlike on land, however, because many organisms live in the upper layers of wat... More »