Species most often seen in Palau are gray reef sharks, blacktips and whitetips.
Sharks are cold-blooded fish and have a skeleton that is made of cartilage.
One indicator of the species type is the sharks' teeth. Their teeth are species specific because each species has adapted to a particular diet. Some sharks eat only one kind of animal while others are not as choosy. Most sharks are nocturnal. Seeing schools of sharks around Palau is rare, but should always be treated with caution.