David Fleetham / Cleaner shrimp (Urocaridella antonbrunii) inspecting mouth of Yellow edged / margin moray eel (Gymnothorax flavimarginatus), Mabul Island, Malaysia.

David Fleetham / Cleaner shrimp (Urocaridella antonbrunii) inspecting Yellow edged / margin moray eel (Gymnothorax flavimarginatus), Mabul Island, Malaysia.

David Fleetham / Cleaner shrimp (Urocaridella antonbrunii) scouring a Yellow edged / margin moray eel (Gymnothorax flavimarginatus) for parasites, Mabul Island, Malaysia.

David Fleetham / Yellow edged / margin moray eel (Gymnothorax flavimarginatus), feeding on surgeonfish, Hawaii.

Pete Oxford / Yellow-edged Moray (Gymnothorax flavimarginatus) hiding in reef, Raja Ampat Islands, Indonesia

Pete Oxford / Yellow-edged Moray (Gymnothorax flavimarginatus) hiding in reef, Raja Ampat Islands, Indonesia

Sergio Hanquet / Yellowmargin moray (Gymnothorax flavimarginatus) resting on coral reef, Maldives, Indian Ocean.

Sergio Hanquet / RF - Yellowmargin moray (Gymnothorax flavimarginatus) with mouth open displaying aggression, Maldives, Indian Ocean. (This image may be licensed either as rights managed or royalty free.)

David Fleetham / Two Scarlet cleaner shrimps (Lysmata amboinensis) inspecting a Yellowmargin moray eel (Gymnothorax flavimarginatus) off Sabang Beach, Mindoro, Philippines, Pacific Ocean.

Alex Mustard / Yellowmargin moray (Gymnothorax flavimarginatus) peering out from Digitate leather coral (Sinularia sp.) on a reef, Ari Atoll, Maldives, Indian Ocean.

David Fleetham / Yellowmargin moray eel (Gymnothorax flavimarginatus) sheltering in a crevice behind a Slate pencil sea urchin (Heterocentrotus mammillatus), Hawaii, Pacific Ocean.

David Fleetham / Yellow margin moray eel (Gymnothorax flavimarginatus) with two Blue goatfish (Parupeneus cyclostomus), a Bluefin trevally (Caranx melampygus) and a Peacock grouper (Cephalopholis argus) hunting co-ope...