Whales-Dolphins relation.

 

    Whales and dolphins are both mammals.  They both belong to the order Cetacea.  Cetaceans - and this order includes porpoises too - are marine animals that have descended from land animals.   This can be seen from the fact that the bones in their fins resemble the limbs of land mammals, and they need to come to the surface to breathe.

    All cetaceans have stream lined bodies without any protruding parts, allowing the animals to glide through water.  Beneath hairless skin, both dolphins and whale carry a layer of blubber that keeps them warm.  All cetaceans spend their entire lives in oceans and rivers, where they pump their tail flukes to move through the water, while using their flippers for stability.

  Dolphins tend to inhabit shallower water nearer the coast, while most baleen whales live in deeper water further out to sea.  However, dolphins are generally smaller than whales.

    Dolphins and whales have many similarities, but dolphins are different from whales in manways too. Dolphins are generally smaller in size than whales, Whereas whales tend to be between 3.3 and 33 metres long, dolphins are between 1.7 and 9.5 metres long.

    While all dolphins have one blowhole, baleen whales - those that feed on plankton and small fish- have two blowholes.  Dolphin teeth are conical, and tend to be quite sharp.  They are used for grabbing and dragging prey into the mouth, where it is then swallowed whole.

    Generally, dolphins come closer to shore than whales do, to feed. They often chase fish into shallow water to catch them esily.  Another method they adopt is driving prey onto mud banks for easy capture.  As far as intelligence is concerned, dolphins and whales anre equally intelligent.