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Message: <blockquote data-quote="sirajstc" data-source="post: 5069604" data-attributes="member: 91140">Although dolphins, porpoises and whales (blue, beluga, humpback, killer, sperm, etc) look like fish, technically they are classified as mammals. As with all mammals, dolphins/whales bear their young live and the young feed from the mother's mammaries. According to Merriam-Webster Dictionar a fish is any of numerous cold-blooded strictly aquatic craniate vertebrates that include the bony fishes and usually the cartilaginous and jawless fishes and that have typically an elongated somewhat spindle-shaped body terminating in a broad caudal fin, limbs in the form of fins when present at all, and a 2-chambered heart by which blood is sent through thoracic gills to be oxygenated  Dolphins are warm blooded (constant body temperature instead of temperature of the environment), have a 4-chambered heart and do not have gills by which to extract dissolved oxygen from the water. They have a blow hole through which they breathe air from the atmosphere. Dolphins are considered to be highly intelligent animals. However, there is actually a dolphin fish, (also posted by Br. Woodrow) but it looks quite different. The dolphin fish is also called a mahi mahi.  <img src="http://www.grandillusionpr.com/images/mahi_mahi.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></blockquote>

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