Doug Perrine / Reef manta ray (Manta alfredi) feeding on plankton attracted by light at night, among schooling Hawaiian flagtail (Kuhlia xenura) akako Bay, Keahole, Kona, Hawaii. August.

Jordi Chias / Reef manta (Manta alfredi) mouth open feeding at night, South Ari atoll, Maldives, Indian Ocean

Jordi Chias / Reef manta ray (Manta alfredi) being cleaned by small wrasses at cleaning station, South Ari atoll, Maldives, Indian Ocean

Jordi Chias / Reef manta ray (Manta alfredi) being cleaned by small wrasses at cleaning station, South Ari atoll, Maldives, Indian Ocean

Doug Perrine / Researcher Mark Deakos using a video camera with laser spotting lights to record the identification pattern (unique pattern of spots on underside) of a Reef manta ray (Manta alfredi) Makalawena, Kona,...

Doug Perrine / Reef manta rays (Manta alfredi) at a cleaning station on a coral reef between Makalawena and Mahaiula to have parasites removed by wrasses, Kona Coast, Hawaii, USA. Central Pacific Ocean.

Doug Perrine / Reef manta ray (Mobula alfredi) with Saddle wrasses (Thalassoma duperrey) and Hawaiian cleaner wrasses (Labroides phthirophagus) at cleaning station on coral reef, Keahole Point, North Kona, Hawaii Is...

David Fleetham / Reef manta rays (Mobula alfredi) feed over baskets of lights used to attract plankton at night, Kona Coast, Big Island, Hawaii, Pacific Ocean.

Russell Laman / Remoras (Echeneis naucrates) swimming on underside of Reef manta (Mobula alfredi), Raja Ampat, Indonesia, Pacific Ocean.

Russell Laman / Reef manta (Mobula alfredi) getting cleaned of parasites, dead skin, bacteria, and mucus by Blacklip butterflyfish (Chaetodon kleinii) and Moon wrasse (Thalassoma lunare) at a cleaning station in Raja...

Alex Mustard / Reef manta ray (Mobula alfredi) feeding on plankton attracted to diving torches placed on the seabed at night, Ari Atoll, Maldives, Indian Ocean.

Alex Mustard / Reef manta ray (Mobula alfredi) feeding on plankton aggregating in the lights from a boat at night, Ari Atoll, Maldives, Indian Ocean.