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

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

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

Norbert Wu / Remora (Remora remora) on Manta Ray (Manta birostris), Revillagigedos Islands, Mexico

Flip Nicklin / Spinner Dolphin (Stenella longirostris) jumping with Remora (Remora remora) attached, Hawaii

Flip Nicklin / Remora (Remora sp) attached to researcher's hand by suction, Hawaii

Norbert Wu / Remora (Remora remora) trio, top of the head is modified with plates to stick onto animals, Bahamas, Caribbean

Flip Nicklin / Manta Ray (Manta birostris) with two Remora (Remora remora) off of Baja California, Mexico

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

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

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

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

Norbert Wu / Manta Ray (Manta birostris) with Remora (Remora remora), Revillagigedo, Baja California, Mexico, Pacific Ocean

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

Norbert Wu / Remora (Remora remora) pair use plates on head to attach to sharks and large fish

Fred Bavendam / Silky Shark (Carcharhinus falciformis) with remora, Cocos Island, Costa Rica

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

Hiroya Minakuchi / Bottlenose Dolphin (Tursiops truncatus) with Remora (Remora remora) pair attached to underside, Ogasawara Island, Japan