Doug Perrine / Yellow edged moray eel {Gymnothorax flavimarginatus} having mouth cleaned by Humpback cleaner shrimp {Lysmata amboinensis} Sabah Borneo (Non-ex).

David Hall / Banded tozeuma shrimp (Tozeuma armatum) on Black coral (Antipatharia). Komodo, Indonesia.

SCOTLAND: The Big Picture / Humpback shrimp (Pandalus montagui), North Scotland, UK, July.

Sue Daly / Humpback Prawn (Pandalus montagui) St Abbs Voluntary Marine Reserve, Scotland (North Sea).

Solvin Zankl / Humpback / Northern / Scarlet cleaner shrimp (Lysmata amboinensis) cleaning the mouth of a Banana fusilier (Pterocaesio pisang) Raja Ampat, West Papua, Indonesia, Pacific Ocean.

Doug Perrine / Yellow edged moray eel {Gymnothorax flavimarginatus} being cleaned by Humpback cleaner shrimp {Lysmata amboinensis} Mabul, Borneo, Malaysia

Doug Perrine / Giant moray eel {Gymnothorax javanicus} being cleaned by Humpback cleaner shrimp {Lysmata amboinensis} Sipadan, Sabah, Borneo, Malaysia

Doug Perrine / Yellow edged moray eel {Gymnothorax flavimarginatus} having mouth cleaned by Humpback cleaner shrimp {Lysmata amboinensis} Sabah Borneo (Non-ex).

Doug Perrine / Grey faced moray eel {Siderea thrysoidea} cleaned by Humpback cleaner shrimp {Lysmata amboidensis} Bali Indonesia (Non-ex).

Shane Gross / Kelp humpback shrimp (Hippolyte clarki) on eelgrass (Zostera marina) off Vancouver Island, British Columbia, Canada