What is a called blooded animal?

Cold Blooded Animal

Many animals such as fish, frogs, snakes and lizards are often called “cold-blooded,” as opposed to “warm-blooded” mammals and birds.  

This does not mean their blood is always cold.  Unlike warm-blooded animals, they do not have built-in temperature controls that keep their bodies evenly warmed.

Instead, their body temperature is usually near that of the surrounding air or water air or water.  The cold-blooded animal is hot in hot weather, and cold in cold weather.  

Many depend on the sun for their body heat. Lizards, for example bask in the sun to warm their bodies.-Dick Rogers

Can fish drown?

Fish can drown under certain conditions.  It isn’t the water that keeps fish alive, but the oxygen in the water.  Fish breathe oxygen, just as we do.  The water contains oxygen that comes from the air or is given off by water plants.  A fish takes the oxygen out of the water by means of its gills.  

When a fish is placed in a small tank of water, however, it may soon use up all the oxygen that is in the water.  If this happens, the fish suffocates.  This is why, if you keep pet fish, you must change the water frequently in order to give them a fresh supply of oxygen.–Dick Rogers