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.