Whales are mammals that have an incredibly size range, yet all whales fall between 13 feet long and 90 feet long. The blue whale, the largest known whale or mammal, ranges from around 70 feet to 90 feet. Most other well-known whales, such as the orca, sperm, humpback and minke whale, fall in a range of 20 to 69 feet.Know More
The blue whale is recorded to be almost the same size as the Argentinosaurus, an incredibly large dinosaur from the Mesozoic Era. Whales were a species of massive quantity until the 20th century. By that point, whaling had taken a serious toll on their population's numbers, and all types of whales, but especially blue whales, began to have a major decrease in population. More recently, steps have been taken to stop poachers from attacking whales, and whaling has been made illegal.
Whales are often used in literature to represent a great beast due to their large size. In "Moby Dick," a giant whale is the antagonist against a group of whalers. They are also famous not only for their large size but also their large voices, which can range from 155 decibels to 188 decibels, frequencies that are higher than most other mammals, and they even make "songs" with these noises.Learn more about Marine Mammals
Dolphins are mammals, and all mammals have some type of hair. There is a misconception that the bottlenose dolphin has no hair on its body, but dolphins do have a small area on their noses that produces hair.Full Answer >
As mammals, baby dolphins survive on milk for the first few years of life, although they may learn to catch fish at only a few months of age. Over time, dolphins depend less on milk and more on fish and squid.Full Answer >
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 vent carbon dioxide and acquire more oxygen. Dolphins and whales have blowholes that facilitate this process, while seals and most other marine mammals breathe through their noses after surfacing.Full Answer >
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 other species. They are the heaviest weasels and the second smallest marine mammals.Full Answer >