A black manta ray, Mobula alfredi, visits a cleaning station on a reef in Komodo National Park, Indonesia.

A large reef manta ray (Mobula alfredi) swims through clear water in Raja Ampat, Indonesia. This beautiful region is known as the heart of the Coral Triangle and is a popular destination for scuba divers and snorkelers.

A large manta ray, Mobula alfredi, swimming along a reef drop off in Raja Ampat, Indonesia.

A manta ray passes overhead under the sun, Socorro Island, Mexico.

A manta ray (Mobula alfredi) swimming near a cleaning station in Raja Ampat, Indonesia.

A black manta ray, Mobula alfredi, visits a cleaning station on a reef in Komodo National Park, Indonesia.

A reef manta ray (Mobula alfredi), hovers over a reef where small cleaner wrasse will relieve her of her parasites, Maldives.

Adult reef manta ray (Mobula alfredi), underwater in Coral Bay, Western Australia, Australia, Pacific

Adult reef manta ray (Mobula alfredi), underwater in Ningaloo Reef, Western Australia, Australia, Pacific

Adult reef manta ray (Mobula alfredi), underwater in Ningaloo Reef, Western Australia, Australia, Pacific

Adult reef manta ray (Mobula alfredi), swimming on Ningaloo Reef, Western Australia, Australia, Pacific

Two Reef manta rays (Mobula alfredi) swims with open mouth over sandy bottom, from the front, Great Barrier Reef, Coral Sea, Pacific Ocean, Australia, Oceania

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

Reef manta ray (Mobula alfredi) swim with open head fins in blue water, Great Barrier Reef, Unesco World Heritage, Coral Sea, Pacific Ocean, Australia, Oceania

Reef manta ray (Mobula alfredi), silhouette, swimming in blue water, back light, Great Barrier Reef, Coral Sea, Pacific Ocean, Australia, Oceania

Diver observes reef manta ray (Mobula alfredi), Great Barrier Reef, Unesco World Heritage, Coral Sea, Pacific, Australia, Oceania

Reef manta ray (Manta alfredi) swims in blue water, Andaman Sea, Mu Ko Similan National Park, Similan Islands, Phang Nga Province, Thailand, Asia

Endemic Hawaiian Saddle Wrasse (Thalassoma duperrey) approach to clean a Reef Manta Ray (Mobula (formerly Manta) alfredi) of parasites at a reef cleaning station off the Kona Coast, the Big Island, Hawaii, USA. This particular female manta with a missing

A Reef Manta Ray (Mobula (formerly Manta) alfredi) hovers over a reef cleaning station off the Kona Coast, the Big Island, Hawaii, USA. This particular female manta with a missing left cephalic lobe has been observed by divers and snorkelers at Kona since

While a Hawaii Cleaner Wrasse (Labroides phthirophagus) searches for parasites in its mouth, a Reef Manta Ray (Mobula (formerly Manta) alfredi) hovers over a reef cleaning station off the Kona Coast, the Big Island, Hawaii, USA during the summer. This par

Reef manta ray (Mobula alfredi) making a 180-degree turn in the translucent reef waters of the Mayotte lagoon.

Reef manta rays (Manta alfredi formerly Manta birostris) chain-feeding on plankton. Hanifaru Lagoon, Baa Atoll, Maldives, Indian Ocean

Manta ray, (Manta alfredi) on a cleaning station. Baa Atoll, Maldives, Indian Ocean

Reef manta rays (Manta alfredi formerly Manta birostris) chain-feeding on plankton. Hanifaru Lagoon, Baa Atoll, Maldives, Indian Ocean

Manta ray, (Manta alfredi) on a cleaning station. Baa Atoll, Maldives, Indian Ocean

Reef manta ray (Mobula alfredi) feeding between the corals in the pools of Longoni, Mayotte.

Reef manta ray (Mobula alfredi) above the reef of the Langoni pass. Mayotte

Reef manta ray (Mobula alfredi) above the reef of the Langoni pass. Mayotte

Reef manta ray (Manta alfredi) at a depth of 50 metres in the lagoon of Mayotte.