Nurse sharks (Ginglymostoma cirratum), being fed in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize

Nurse sharks (Ginglymostoma cirratum), being fed in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize

Nurse shark (Ginglymostoma cirratum), on the sand in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Southern stingray (Hypanus americanus) being fed in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize

Southern stingray (Hypanus americanus) buried in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize

Southern stingray (Hypanus americanus) over sand in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize

Southern stingray (Hypanus americanus) over sand in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize

Southern stingray (Hypanus americanus) over sand in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize

Southern stingray (Hypanus americanus) over sand in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize

Nurse shark (Ginglymostoma cirratum), on the sand in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Nurse shark, Ginglymostoma cirratum, Fernando de Noronha, Pernambuco, Brazil, Atlantic Ocean

Scuba diver handles nurse shark, Ginglymostoma cirratum, Molasses Reef, Key Largo, Florida, USA, Atlantic Ocean

Whitetip reef sharks (Triaenodon obesus) resting on rocks, San Benedicto Island, near Socorro, Revillagigedo Islands, archipelago, Mexico, eastern Pacific

Tawny nurse shark (Nebrius ferrugineus) lies on a sandy bottom, Indian Ocean, Maldives, Asia

Sea Turtle with bite marks on fins swims in blue water. Close-up of Great Green Sea Turtle (Chelonia mydas) with its front flippers bitten off by a shark swimming slowly over seabed, Red sea, Egypt, Africa

Snorkeling in Shark Alley and Hol Chan Marine Reserve, Ambergris Cay, Belize

Although rarely seen in the ocean by divers, the Sandbar shark (Carcharhinus plumbeus) is likely the most numerous of all shark species found in Hawaii. This individual was photographed at the Maui Ocean Center Aquarium, Maui, Hawii, United States of America

striped remora or live sharksucker remora cleaning scraps from inside the mouth of a lemon shark Negaprion brevirostris resting on the bottom is a strong current Thought to be a parasite this is one of the first images showing a benefit for the shark in this relationship West End Grand Bahamas Atlantic Ocean

Great Hammerhead Shark and divers on sandy bottom, Bahamas

Great Hammerhead Shark and divers on sandy bottom, Bahamas

Tiger shark swimming above a sandy bottom, Bahamas

Two Grey Reef Sharks (Carcharhinus amblyrhynchos) swimming above the bottom, Tahiti, French Polynesia

Tiger shark swimming above a sandy bottom, Bahamas

Grey reef shark (Carcharhinus amblyrhynchos) above the bottom, Jardines de la Reina National Park, Cuba