Sharks cruise by

Sharks can smell blood from 400 meters away and never stop swimming, even while asleep they keep moving though the ocean. Most sharks swim an average of about 5 miles per hour. When feeding time comes around an average shark can reach up to speeds of 12 miles per hour making them a strong force to deal with. But don't let their sharp teeth and swift speed scare you, sharks never attack humans on purpose. They usually mistake humans for seals or other fish. 

There are more than 440 types of sharks in the ocean. The Bull Shark is by far one of the most dangerous predator in the water. With it's ability to swim in salt and fresh water. It also has a habit of eating anything in it's path. The biggest of these sharks are the Whale Sharks, which can grow up to 40 feet long. Not to fear though, Whale Sharks consume tiny fish. The Dwarf Lanternshark is the smallest of all sharks. Fitting comfortably in the palm of your hand and as an added bonus can glow in the dark. It's diet consists of small fish, shrimp and krill.

Dwarf Lanternshark

http://animals.nationalgeographic.com/animals/fish/whale-shark/
http://animals.nationalgeographic.com/animals/fish/bull-shark/
http://dsc.discovery.com/tv-shows/shark-week/lists/top-shark-facts.htm