Female sperm whales mate once every 4 to 20 years until they are about 40 years old. The plates allow whales to feed on large quantities of prey at once while filtering out seawater. Baleen whales have as many as 600 plates of baleen in their upper jaws. Only two types of whales are known to have teeth, and these are beaked whales and sperm whales. Instead of teeth, baleen whales have a substance called a "baleen plate." 1. Dolphins tend to wean their young sooner than whales do and will even chase off weaned calves. … Dolphin vs. Whale Feeding. Since they have this plate, they must hunt and eat their food differently than toothed whales do. They even beat the largest of the dinosaurs. Sperm Whales Are Not True Whales Because They Have True Teeth And NOT Baleen. Some baleen whales also eat small schooling fishes, and a variety of crustaceans such as krill, copepods, and amphipods. Search. sperm whales live in a abyss a blue whale would get crushed if it went down there. Baleen whales have two blowholes, as opposed to toothed whales which have one. 14 Types of Baleen Whales. The whale's baleen plate is shaped much like a comb or a sieve. Animals & Nature. [citation needed] While toothed whales are capable of using echolocation to detect the size and nature of objects, this capability has never been demonstrated in baleen whales. Compared to the tooth whales, they are not fast swimmers. Like all mammals, baleen whales breathe air and must surface periodically to do so. The baleen whales lack dorsal fins and the few that have very small ones. 3. Baleen whales, such as the gigantic 30m-long blue whale, are the largest animals that have ever lived on this planet. Search the site GO. Frigid, arctic waters support some of the largest whale species, such as the humpback and the blue whale. Menu. sperm whales are smaller than blue whales. While the toothed whales have one blow hole, the baleen whales have 2. All other whales are known as baleen whales which have keratin bristles in place of teeth which they use to filter out krill and other tiny organisms that make up their diet. Learn about the 14 different species of baleen whales, including northern and southern right whales, humpback whales, minke whales, and blue whales. Baleen whales, some of which are the largest animals to have ever lived on earth, eat some of the smallest, most abundant life in the oceans: plankton. While the complex sounds of the humpback whale (and some blue whales) are believed to be primarily used in sexual selection, the simpler sounds of other whales have a year-round use. No, they couldn’t if they wanted to. Other fossil sperm whales with adaptations similar to this are collectively known as killer sperm whales. Sperm whales are around the same size and weight as the Bowhead Whale, Northern and Southern Right Whale, Gray Whale, Humpback Whale, Sei Whale and Bryde's Whale.