Dolphins are carnivorous mammals. One of the best known species of dolphin is the bottlenose dolphin, which lives all over the world in warm waters and is the species often featured in aquatic shows and movies.
Bottlenose dolphins can live up to 50 years in captivity. They typically range in length between 10 to 14 feet and weigh over 1,000 pounds. These dolphins are capable of swimming at speeds close to 20 miles per hour, and they are known to be able to leap out of water over 15 feet. Dolphins are largely social mammals, traveling in groups called pods. These dolphins use various sounds to communicate with each other.Learn More
Mammals are distinguished from other animals by having mammary glands and complex hair follicles, and by the structure of their skulls, which feature highly modified jaw bones. Mammals are also warm-blooded and have a number of adaptations to allow for high metabolism.Full Answer >
The difference between a lizard and a salamander is that a lizard is a reptile and a salamander is an amphibian. Reptiles live solely on land, while amphibians spend part of their time in the water. Hence amphibians need to be near a source of water while reptiles don't.Full Answer >
Sand dollars are actually the skeletons of marine echinoderms and take their off-white, chalky form after the animal dies. They are closely related to flat sea urchins, starfish and sea cucumbers. When alive, they are covered in short, fine spines and range in color from yellow to blue and purple.Full Answer >
Remora and sharks have a commensalism relationship which, according to the Encyclopedia Britannica, is a relationship between two species in which one benefits from the other without either being harmed. Commonly called a suckerfish, the remora is a pelagic marine fish that attaches to the shark and feeds on it. Unlike parasitic species, the remora does not penetrate the flesh of the shark or otherwise cause it damage.Full Answer >