Suckerfish on Divers fin, Echeneis naucrates, Raja Ampat, West Papua, Indonesia

Slender Suckerfish, Echeneis naucrates, St. Johns, Red Sea, Egypt

Slender Suckerfishes, Echeneis naucrates, Aliwal Shoal, Indian Ocean, South Africa

Suckerfish, Echeneis naucrates, Fakarava, Tuamotu Archipel, French Polynesia

Slender Suckerfish, Echeneis naucrates, St. Johns, Red Sea, Egypt

Shoal of Suckerfish, Echeneis naucrates, North Male Atoll, Maldives

Suckerfish, Echeneis naucrates, Fakarava, Tuamotu Archipel, French Polynesia

Live sharksucker (Echeneis naucrates), Rongelap, Marshall Islands, Micronesia, Pacific

Pilot Fish (Naucrates ductor) school. Azores, Portugal, Atlantic

Loggerhead Turtle (Caretta caretta) and Pilot Fish (Naucrates ductor). Azores, Portugal, Atlantic

Grey reef shark (Carcharhinus amblyrhynchos), with remora (Echeneis naucrates), Blue corner, Palau, Caroline Islands, Micronesia, Pacific Ocean, Pacific

Loggerhead Turtle (Caretta caretta) and Pilot Fish (Naucrates ductor). Azores, Portugal, Atlantic.

Live sharksucker, Echeneis naucrates, Rongelap, Marshall Islands, Micronesia

Manta Ray (Manta birostris) with Remora (Echeneis naucrates) swimming above coral reef to cleaning station, Great Barrier Reef, UNESCO World Heritage Site, Cairns, Queensland, Australia, Pacific

Green sea turtle or Green turtle (Chelonia mydas) diving with a Slender Suckerfish (Echeneis naucrates) on its back, Dimakya Island, Palawan, Philippines, Pacific Ocean

Spotted Eagle Rays (Aetobatus narinari) with Live Sharksuckers (Echeneis naucrates) swimming above a coral reef with sandbanks and White Mullet (Mugil curema) near the surface, Half Moon Caye, Lighthouse Reef, Turneffe Atoll, Belize, Central America, Cari

Spotted Eagle Ray (Aetobatus narinari) from above with dotted markings, Live Sharksuckers (Echeneis naucrates) above a coral reef with sandbanks, Half Moon Caye, Lighthouse Reef, Turneffe Atoll, Belize, Central America, Caribbean

Pilot Fish (Naucrates ductor) swimming in front of mouth, reef manta ray (Mobula alfredi) with curled up head fins, Great Barrier Reef, Coral Sea, Pacific Ocean, Australia, Oceania

Spotted Eagle Ray (Aetobatus narinari) from below in blue water, Live sharksucker (Echeneis naucrates), Hopkins, Dangria, Belize, Central America, Caribbean

Oceanic whitetip shark (Carcharhinus longimanus) with Pilot Fish (Naucrates ductor) swims under sea surface in the open sea, Red Sea, Egypt, Africa

Whale shark (Rhincodon typus) swallows plankton, has a ship's keeper (Echeneis naucrates) in its mouth, Philippine Sea, Philippines, Asia

Sharksuckers, Echeneis naucrates, swimming with sea turtle, Red Sea.

Two Live sharksuckers (Echeneis naucrates) on shield, back of sea turtle, Red Sea, Egypt, Africa

Blue shark (Prionace glauca) and Pilot fish (Naucrates ductor), Pico Island, Azores, Portugal, Atlantic Ocean

Loggerhead turtle (Caretta caretta) accompanied by pilotfish (Naucrates ductor) swimming near the surface. Santa Maria Island, Azores, Portugal, Atlantic Ocean

Loggerhead turtle (caretta caretta) accompanied by pilotfish (Naucrates ductor) swimming near the surface. Vulnerable. Santa Maria Island, Azores, Portugal, Atlantic Ocean

Blue shark (Prionace glauca) with fishing hook and Pilot fish (Naucrates ductor), Pico Island, Azores, Portugal, Atlantic Ocean