Alex Mustard / Remoras (Remora sp.) hitchhiking on the tail of a large (13-15m) female whale shark (Rhincodon typus) swims in open water. Wolf Island, Galapagos National Park, Galapagos Islands. East Pacific Ocean.

Franco Banfi / Sperm whale (Physeter macrocephalus) portrait, with remora fish, Dominica, Caribbean Sea, Atlantic Ocean, Vulnerable.

Jordi Chias / Giant Manta (Manta birostris) with Remoras (Remora brachyptera) attached to both wings, offshore Santa Maria Island, Azores, Atlantic Ocean

Jordi Chias / Mobula / Chilean devil ray (Mobula tarapacana) with remora (Remora brachyptera) and Amberjacks (Serila dumerilli) Santa Maria Island, Azores, Atlantic Ocean

Georgette Douwma / Green turtle (Chelonia mydas) with two large remoras (Echeneis naucrates) attached to its carapace, at rest on artificial reef. Mabul, Malaysia.

Brandon Cole / Whale shark (Rhincodon typus) feeding on fish eggs, near surface, with remora (Remora sp) attached to inside of the mouth, Gulf of Mexico, Mexico, Caribbean Sea.

Michael Pitts / Mike de Gruy, underwater camerman, in Remora submersible, Mediterranean

Nuno Sa / Whale Shark (Rhincodon typus) accompanied by Pilot Fish (Naucrates ductor) and Remora. The biggest fish in the world has only started to visit the Azores in the past three years due to water temperatu...

Nuno Sa / Manta Ray (Manta Birostris) and Devil Ray (Mobula tarapacana) in background, accompanied by Pilot Fish (Naucrates ductor) and Remora. Santa Maria Island, Azores, September.

Brandon Cole / Tiger Shark (Galeocerdo cuvier) and Remora fish. Bahamas, Atlantic Ocean, July.

Brandon Cole / Tiger Shark (Galeocerdo cuvier) accompanied by Remora fish. Bahamas, Atlantic Ocean, July.

Brandon Cole / Caribbean Reef Shark (Carcharhinus perezi) with a Remora. Bahamas, Atlantic Ocean, July.

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

Alex Mustard / Lemon shark (Negaprion brevirostris) accompanied by Remoras (Echeneis naucrates) at night. Little Bahama Bank, Bahamas. Tropical West Atlantic Ocean.

Doc White / Manta ray (Manta hamiltoni) accompanied by two symbiotic Remora, Eastern Pacific

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.

Luis Quinta / Devil ray {Mobula tarapacana} with remora, Azores, Atlantic

Brandon Cole / Whale Shark (Rhincodon typus) with 10 foot tail fin and Remora fish attached, Galapagos Islands, Pacific Ocean

Doug Perrine / Common remora fish {Remora remora} Bahamas

Doug Perrine / Newborn Lemon shark pup swims away from mother {Negaprion brevirostris} Bahamas, Caribbean (Non-ex).

Michael Pitts / Tiger shark {Galeocerdo cuvieri} with remora fish. South Africa, Atlantic. NB stripes

Jurgen Freund / Grey reef shark {Carcharhinus amblyrhynchos} with Remora fish, Great Barrier reef, Queensland, Australia

Georgette Douwma / Green turtle feeding on coral {Chelonia mydas} with Remora fish, Sipadan, Sabah

Jeff Rotman / Zambesi / Bull shark {Carcharhinus leucas} with Remora fish Natal, South Africa

Tim Fitzharris / Whale Shark (Rhincodon typus) eating with attendant Remoras (Remora remora), Philippines

Fred Bavendam / Loggerhead Sea Turtle (Caretta caretta) swimming underwater with Remora attached to its carapace, South Caicos, British West Indies

Norbert Wu / Caribbean Reef Shark (Carcharhinus perezii) with remora attached, Bahamas, Caribbean

Norbert Wu / Remora (Remora remora) top of head modified with plates to stick onto animals, worldwide

Flip Nicklin / Sperm Whale (Physeter macrocephalus) adult with attached Remoras skimming ocean surface, Dominica

Flip Nicklin / Manta Ray (Manta birostris) with two Remora (Remora remora) attached to it, Hallcion Reef, Cocos Island, Costa Rica

Flip Nicklin / Atlantic Spotted Dolphin (Stenella frontalis) underwater portrait with remora attached to belly, Bahamas

Pascal Kobeh / Sicklefin devil ray or Chilean devil ray (Mobula tarapacana) with two shark suckers (Remora remora) Azores, Atlantic Ocean.

Pascal Kobeh / Sicklefin devil ray or Chilean devil ray (Mobula tarapacana) with two shark suckers (Remora remora) Azores, Atlantic Ocean.

Pascal Kobeh / Sicklefin devil ray / Chilean devil ray (Mobula tarapacana) with two shark suckers (Remora remora) Azores, Atlantic Ocean.

Pascal Kobeh / Close-up of Horn-nosed / Largenose boxfish (Ostracion rhinorhynchos) with a striped remora (Echeneis naucrates) on its head at night, Sulu Sea, Philippines

Pascal Kobeh / Close-up of Horn-nosed / Largenose boxfish (Ostracion rhinorhynchos) with a striped remora (Echeneis naucrates) on its head at night, Sulu Sea, Philippines

Pascal Kobeh / Close-up of Horn-nosed / Largenose boxfish (Ostracion rhinorhynchos) with a striped remora (Echeneis naucrates) on its head at night, Sulu Sea, Philippines

David Fleetham / Lemon shark (Negaprion brevirostris) underwater with Remoras (Echeneididae), motion blurred image. West End, Grand Bahama, Bahamas.

David Fleetham / Oceanic whitetip shark (Carcharhinus longimanus) with Pilot fish (Naucrates ductor) and Remora (Echeneididae). In open ocean several miles off The Big Island / Hawaii, Hawaii.

Tony Wu / Humpback whale (Megaptera novaeangliae australis) vocalising with head-down, attended to by Remoras (Echeneidae sp). Vava'u, Tonga, South Pacific.

Alex Mustard / Reef manta (Mobula alfredi) swimming with Remoras (Remora remora). South Ari Atoll, Maldives. Indian Ocean.

Alex Mustard / Remora (Remora remora) schooling beneath dive boat on a coral reef. North Male Atoll, Maldives. Indian Ocean.

Franco Banfi / Sperm whale (Physeter macrocephalus) portrait just below surface, with remora fish, Dominica, Caribbean Sea, Atlantic Ocean, Vulnerable.

Linda Pitkin / Whale shark (Rhincodon typus), with remoras (Echeneis naucrates), Mai Mai, between Triton Bay and Kaimana, West Papua, Indonesia

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...

David Fleetham / Remora (Echeneis naucrates) free swimming, Beqa Lagoon, Fiji

David Fleetham / Remora (Echeneis naucrates) free swimming shoal, Beqa Lagoon, Fiji