Different otter species spend different amounts of time living with their mothers after birth. River otters stay with their mothers for about a year, usually long enough for her to become pregnant and deliver a new litte... More »

Dolphins generally give birth to just one baby at a time, which is referred to as a calf. Unlike many animals, dolphins rarely have multiple births. After enduring a gestation period of 9 to 17 months, expectant dolphins... More »

Sea otters are mammals that belong to the weasel family, have the densest fur of all animals and are a keystone species. As a keystone species, the sea otter is critical for the health and well-being of a great number of... More »

www.reference.com Pets & Animals Mammals Marine Mammals

Killer whales eat a wide range of large animals, including seals, sea lions, smaller whales, bony fish, sharks, cephalopods, sea turtles and otters. They are the apex predators of the oceans, swallowing smaller prey whol... More »

www.reference.com Pets & Animals Mammals Marine Mammals

Sea otters protect themselves from predators by escaping to dry land, hiding in kelp or swimming away. The main predators of sea otters are water-bound sharks and killer whales, so sea otters can protect themselves by cl... More »

Most otters eat crayfish, crabs, fish, frogs and other aquatic invertebrates. The diet of otters varies, however, depends on the species, location of residence and availability of food sources. Small otters generally con... More »

www.reference.com Pets & Animals Mammals Marine Mammals

Although most mammals are terrestrial, many species inhabit the world’s oceans and seas, including seals, otters, whales and dolphins. As air-breathing mammals, these creatures must return to the water's surface often to... More »

www.reference.com Pets & Animals Mammals Marine Mammals