The two parvorders, baleen whales (Mysticeti) and toothed whales (Odontoceti), are thought to have diverged around thirty-four … Se mere

Range and habitat
Cetaceans are found in many aquatic habitats. While many marine species, such as the blue whale, the humpback whale and the Se mere

Reproduction and brooding
Most cetaceans sexually mature at seven to 10 years. An exception to this is the La Plata dolphin, which is sexually mature at two years, but lives … Se mere

Cetacean bodies are generally similar to those of fish, which can be attributed to their lifestyle and the habitat conditions. Their body is well … Se mere

Circulation
Cetaceans have powerful hearts. Blood oxygen is distributed effectively throughout the body. They are … Se mere

Sleep
Conscious breathing cetaceans sleep but cannot afford to be unconscious for long, because they may drown. While knowledge of sleep … Se mere

Brucellosis affects almost all mammals. It is distributed worldwide, while fishing and pollution have caused porpoise population density pockets, which … Se mere