Alex Mustard / Giant Pacific Manta Ray (Manta birostris) portrait with Remora fish (Echeneididae) Roca Partida, Revillagigedos Islands, Mexico. East Pacific Ocean. February

Doug Allan / Humpback whale (Megaptera novaeangliae) mother and calf, female with Remoras on underside, Vava'u, Kingdom of Tonga, South Pacific, September. Not available for ringtone/wallpaper use.

Doug Perrine / humpback whale mother and calf, Megaptera novaeangliae, with remora fish around calf, Vava'u, Kingdom of Tonga, South Pacific

Doug Perrine / Humpback whale (Megaptera novaeangliae) calf with Remora fish (Echeneidae) on underside. Vava'u, Kingdom of Tonga, South Pacific.

Doug Perrine / Humpback whale (Megaptera novaeangliae) mother supporting her calf at the water surface, Vava'u, Kingdom of Tonga, South Pacific. September. Both mother and baby have remora fish attached to their und...

Doug Perrine / Humpback whale (Megaptera novaeangliae) mother supporting her calf at the water surface, Vava'u, Kingdom of Tonga, South Pacific. September. Both mother and baby have remora fish attached to their und...

Alex Mustard / Giant Pacific Manta Ray (Manta birostris) with Remora (Echeneididae) fish is cleaned by an Orange Clarion Angelfish (Pomacanthinae) Roca Partida, Revillagigedos Islands, Mexico. East Pacific Ocean. F...

Barry Mansell / Close up of head and sucker of Remora {Echeneididae}

Pete Oxford / Close-up of head of Remora fish {Echeneididae family} showing suction pad used to adhere to host fish, Trinidad

Pete Oxford / Close-up of sucker of Remora fish {Echeneididae family} Trinidad. Sucker adheres to host fish

Franco Banfi / Green turtle (Chelonia mydas) on seabed feeding on Seagrass (Halophila stipulacea) with Remora fish (Echeneis naucrates), Abu Dabbab Bay, Marsa Alam, Egypt, Red Sea. Endangered.

Doug Allan / Humpback whale (Megaptera novaeangliae) female with shoal of Remora (Remora remora) attached to underside and calf surfacing, Vava'u, Kingdom of Tonga, South Pacific, 2006.