Dolphins facts and informations for a 3rd grader

These are some facts and information's about Dolphins required to know by a 3rd grader in Maldives. 

Basic information on dolphin

 

Dolphins are highly intelligent marine mammals and are part of the family of toothed whales that includes orcas and pilot whales.

Dolphin coloration varies, but they are generally gray in color with darker backs than the rest of their bodies.  

Dolphins live in social groups of five to several hundred. They are found worldwide, mostly in shallow seas of the continental shelves, and are carnivores, mostly eating fish and squid.

Dolphins are well known for their agility and playful behavior, making them a favorite of wildlife watchers. Many species will leap out of the water, spy-hop (rise vertically out of the water to view their surroundings) and follow ships.

To prevent drowning while sleeping only half of the dolphin’s brain goes to sleep while the other half remains awake so they can continue to breathe.

I hope this helps to someone in the 3rd grade (3rd step). 

Reference 

http://www.defenders.org/dolphin/basic-facts