Whales, porpoises and dolphins belong to which group of aquatic mammals?
Porpoise Porpoise Porpoises are a group of fully aquatic marine mammals, all of which are classified under the family Phocoenidae, parvorder Odontoceti (toothed whales). There are seven extant species of porpoise. They are small toothed whales that are very closely related to oceanic dolphins. The most obvious visible difference between the two groups is that porpoises have shorter beaks and flattened, spade-shaped teeth distinct from the conical teeth of dolphins. Porpoises, and other cetaceans, belong to the clade Cetartiodactyla with even-toed ungulates, and their closest living relatives are the hippopotamuses, having diverged from them about 40 million years ago. Porpoises range
Geography of Newfoundland and Labrador rock crabs. The deeper waters are home to a variety of fish, such as Atlantic cod, sculpins and cunners, halibut, haddock, sharks, and marine mammals, such as dolphins, porpoises, and whales. Whales seen off Newfoundland include Pilot whales, minkes, sei whales, fin whales and humpbacks. Harp and hooded seals are usually found in the spring, giving birth to their young on coastal ice floes. The tundra is a sub-Arctic zone with long, cold winters and short, warm summers. Precipitation is low. Soil a meter below ground and deeper is permanently frozen (permafrost), which does not allow water to drain easily