Steller’s sea cow (Hydrodamalis gigas) was an extinct sea mammal first described by Georg Wilhelm Steller in 1741. It lived near the Commander Islands in the Bering Sea, between Alaska and Russia. During the Pleistocene epoch, its range covered much of the North Pacific, but it likely became limited to the Commander Islands due to changes in ice ages.
The dugong ( / ˈ d ( j ) uː ɡ ɒ ŋ / ; Dugong dugon ) is a marine mammal. It is one of four living species in the order Sirenia, which also includes three types of manatees. It is the only living member of the family Dugongidae.
The West Indian manatee (Trichechus manatus), also called the North American manatee, is a large, water-dwelling mammal that lives in warm coastal areas of the Caribbean, from the eastern United States to northern Brazil. It lives alone or in groups, eats underwater plants, and uses its whiskers to find its way. This species has two subspecies: the Florida manatee (T.
The Amazonian manatee (Trichechus inunguis), which is sometimes called cowfish in Brazil, is a type of manatee found in the Amazon Basin of Brazil, Peru, Colombia, and Ecuador. It has thin, wrinkled skin that is brownish or gray in color, with fine hairs spread across its body and a white patch on its chest. It is the smallest of the three manatee species that still live today.
The African manatee (Trichechus senegalensis), also called the West African manatee, is a type of manatee that lives in many areas of Western Africa, from Senegal to Angola. It is the only manatee species found in the Old World. It is also one of the two living Sirenians in the Old World, with the other being the dugong.
The baiji (Lipotes vexillifer) is a species of river dolphin that lived in the Yangtze River system in China. It is believed to be the first dolphin species to go extinct because of human actions. The International Union for Conservation of Nature (IUCN) lists the baiji as “critically endangered: possibly extinct.” Scientists have not seen it for more than 20 years, and many searches of the Yangtze River have not found any evidence of its existence.
The Irrawaddy dolphin (Orcaella brevirostris) is a type of dolphin that can live in both saltwater and freshwater. It is found in small groups near coastlines, in rivers, and in areas where saltwater and freshwater mix, such as parts of the Bay of Bengal and Southeast Asia. This dolphin looks very similar to the Australian snubfin dolphin, which belongs to the same family, Orcaella.
The Ganges river dolphin (Platanista gangetica) is a type of freshwater dolphin that belongs to the Platanistidae family. It lives in the Ganges River and other connected rivers in South Asia, specifically in the countries of India, Nepal, and Bangladesh. This dolphin is closely related to the smaller Indus river dolphin, which lives in the rivers of the Indus Basin in Pakistan and northwestern India.
Angel sharks are a type of shark in the group called Squatina. They are the only living members of the family Squatinidae and the order Squatiniformes. These sharks usually live on sandy ocean floors near a depth of about 150 meters (490 feet).
The common guitarfish (Rhinobatos rhinobatos) is a type of cartilaginous fish in the Rhinobatidae family. It lives in the eastern Atlantic Ocean and the Mediterranean Sea. This fish stays near the ocean floor and eats crustaceans, other invertebrates, and smaller fish.