David Hall / Blue wrasse (Thalassoma lunare) in coral reef. Komodo, Indonesia.

Alex Mustard / Crescent-tail bigeye (Priacanthus hamrur) portrait against blue water. Note there is cleaner wrasse in attendance (below mouth), Gubal Island, Egypt. Red Sea.

Tom Vierus / Mimic filefish (Paraluteres prionurus) and a Moon wrasse (Thalassoma lunare) swimming among a Sea fan, Vatu-i-Ra Conservation Park, between Viti Levu and Vanua Levu, Fiji, 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...

David Fleetham / Crescent wrasse (Thalassoma lunare) male swimming over reef. Pacific Ocean, Philippines.

Sirachai Arunrugstichai / Healthy Staghorn corals (Acropora sp.) with various reef fishes, including Moon wrasses (Thalassoma lunare), and Threespot dascyllus (Dascyllus trimaculatus) and a large school of Bigeye snappers (Lut...