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

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 / Common remora fish {Remora remora} Bahamas

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

Alex Mustard / Lemon shark (Negaprion brevirostris) accompanied by Remoras (Echeneis naucrates) cruises over sponges on a coral reef. Grand Bahama. Bahamas. Tropical West Atlantic Ocean.

Alex Mustard / Lemon shark (Negaprion brevirostris) accompanied by Remoras (Echeneis naucrates) cruises over sponges on a coral reef. Grand Bahama. Bahamas. Tropical West Atlantic Ocean.

Alex Mustard / Lemon shark (Negaprion brevirostris) from above with Remoras (Echeneis naucrates). Little Bahama Bank. Bahamas. Tropical West Atlantic Ocean.

Alex Mustard / A nine-foot (3m) Lemon shark (Negaprion brevirostris) accompanied by Remora and Jacks, swims over the Sugar Wreck. Little Bahama Bank, Bahamas.

Alex Mustard / A lemon shark (Negaprion brevirostris) drags its pectoral fin through the sand as it swims accompanied by Remoras / Sharksuckers (Echeneis naucrates). Little Bahama Bank. Bahamas. Tropical West Atlant...

Alex Mustard / Remora / Sharksucker (Echeneis naucrates) hitches a ride beneath the pectoral fin of a Lemon shark (Negaprion brevirostris). Little Bahama Bank. Bahamas. Tropical West Atlantic Ocean.

Alex Mustard / Male Lemon shark (Negaprion brevirostris) portrait with Remoras / Sharksuckers (Echeneis naucrates). Little Bahama Bank. Bahamas. Tropical West Atlantic Ocean.

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

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

Doug Perrine / Sharksuckers (Echeneis naucrates) with Bull sharks (Carcharhinus leucas) Playa del Carmen, Cancun, Quintana Roo, Yucatan Peninsula, Mexico (Caribbean Sea)

Doug Perrine / Lemon shark (Negaprion brevirostris) with Sharksucker / Remora (Echeneis naucrates) Bahamas, Western Atlantic Ocean

Doug Perrine / Marlin sucker / remora (Remora osteochir) showing sucking / attachment disc, Kona, Hawaii. Captive.

Doug Perrine / Marlin suckerfish / remora (Remora osteochir) showing sucking attachment disc, Kona, Hawaii. Captive.

Doug Perrine / Marlin sucker / remora (Remora osteochir) close-up showing tiny teeth on edges of sucking / attachment disc, Kona, Hawaii. Captive.

Doug Perrine / Marlin sucker / remora (Remora osteochir) showing sucking / attachment disc, Kona, Hawaii. Captive.

Juergen Freund / Sharksucker (Echeneis naucrates) and other fish, Queensland, Australia

Juergen Freund / Sharksucker (Echeneis naucrates), Queensland, Australia

Jeff Rotman / Diver observing Giant Napolean Wrasse (Cheilinus undulatus) with symbiotic Sharksuckers / Remoras (Naucrates ductor). Egypt, Red Sea. Model released.

GEORGETTE DOUWMA / Sharksucker {Echeneis naucrates} catching a ride on a diver, Lembeh Strait, North Sulawesi, Indonesia.

Doug Perrine / Sharpsucker {Echeneis naucrates} clinging to Loggerhead turtle, Bahamas

Doug Perrine / Sharksucker {Echeneis naucrates} clinging to Loggerhead turtle, Bahamas

Flip Nicklin / Mobula Ray (Mobula mobular) pair with attached Remoras (Remora remora), Cocos Island, Costa Rica

Flip Nicklin / Mobula Ray (Mobula mobular) swimming with attached Remoras (Remora remora), Cocos Island, Costa Rica

Flip Nicklin / Whale Shark (Rhincodon typus) with Pilot Fish (Naucrates ductor) and Remoras (Remora sp), Baja California, Mexico

Flip Nicklin / Sperm Whale (Physeter macrocephalus) with Remoras (Remora remora)

Flip Nicklin / Sperm Whale (Physeter macrocephalus) juvenile underwater with Remoras (Remora remora), Dominica, Caribbean

Jeff Rotman / Whale Shark (Rhincodon typus) with Remoras attached to stomach, Western Australia

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

Doug Perrine / Dugong with remoras and golden pilot jack fish {Dugong dugong} Australia (Non-ex).

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

Paul D Stewart / Woodcut illustration of sharks attacking a man, with a ray coming to help, with old colouring. From Gesner 'Icones Animalium' publ. Christof Froschover, Zurich, 1560. This scene is copied by Gesner fr...

Roberto Rinaldi / Hawksbill turtle (Eretmochelys imbricata) with two remoras / suckerfish (Echeneidae) attached to its underside, Pulau Island, Sipadan, Borneo

Flip Nicklin / Blue Whale (Balaenoptera musculus) with remoras attached to dorsal fin, Mexico