There are about 78 types or species of whales, though this number ranges from 78 to 90 depending on the source. This group, called cetaceans, includes dolphins and porpoises, as well as whales.Know More
Of the 78 species of whales, 11 species are baleen whales, which means that they eat by straining small organisms into their mouth. The rest of the species fall under the category of toothed whales. All whales live in a marine environment, or the sea, except for four species of river dolphins that thrive solely in fresh water. Whales all share a few common features, like blowholes. Blowholes are the nostrils of the whale and are positioned on top of the head. They breathe in air through the blowholes when they surface and then close it up when they dive.
Regardless of their status, all types of whales are protected under the Marine Mammal Protection Act, the Office of Protected Resources says. The blue whale, the largest animal on the planet, is listed as endangered, along with beluga whales, humpback whales, sperm whales and killer whales. These animals are threatened by pollution and habitat loss from climate change, collisions with ships, entanglements with fishing nets and illegal whaling.Learn more about Zoology
Frogs, snakes, turtles, rabbits, deer, wolves, cougars and bears live in valleys and ridges. These animals establish their habitats here because both predators and prey have adequate food available. Moreover, valley and ridge climates are ideal for these types of animals.Full Answer >
Many types of sponges exist within the animal kingdom, including the black-ball sponge, boring sponge, branching tube sponge, giant barrel and green finger sponges, and many more. Sponges live primarily in aquatic environments, and they are found on ocean floors around the world. They vary in size and habitat; some are large and have multiple branches like trees, while others contain single stocks and have hard shells.Full Answer >
According to Encyclopedia.com, zooplankton are the prey of the majority of ocean creatures, from the smallest fishes to the largest whales. Zooplankton are considered the second step of the oceanic food web, which starts with phytoplankton.Full Answer >
The four types of mammalian teeth are the incisors, the canines, the molars and the premolars. The canine teeth are cone shaped and sharp while the incisors are shaped like a chisel. The molars and premolars are for chewing and breaking down food.Full Answer >