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.Continue Reading
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
Groups of sea lions, regardless of species, have a number of different names that also identify their physical location and expected seasonal behavior. For example, when found on land, a group of sea lions is called a colony. In the water, a group of sea lions is called a raft.Full Answer >
The number of segments a crustacean has varies greatly depending on the species, but it is possible for all the segments of a crustacean to have appendages. The type of appendage differs according to whether it is on the region of the head, thorax or abdomen.Full Answer >
The Indian Ocean, like many of Earth's oceans, serves as home to a diverse number of species, including anenomefish, Great White sharks, bottlenose dolphins, blue whales, sea turtles, jellyfish, stingrays, sea anemones, sea snakes, worms and stonefish. Creatures inhabiting the Indian Ocean range in size from tiny microorganisms to some of the largest animals on the planet, such as large sharks and blue whales. Some creatures pose little threat to humans and other mammals, while others contain lethal venom or emit potent toxins, potentially causing harm.Full Answer >
There are several million species of animals on the earth, many of which are considered natural wildlife. They range in size from nearly microscopic mites to the 100-foot-long blue whale. Wild animals exist in every habitat, from polar bears in the North Pole to caracals in the African savanna.Full Answer >