SCOTLAND: The Big Picture / Cuckoo wrasse (Labrus bergylta) and Ballan wrasse (Labrus bergylta) on the wreck of Jayne, Shetland

Alex Mustard / A portrait of a male Ballan wrasse (Labrus bergylta), showing his bright mating colours. Plymouth, Devon, England, Great Britain. Wreck of the Glen Strathallan, Plymouth Sound, English Channel. Highly...

Sue Daly / Ballan wrasse (Labrus bergylta), Sark, British Channel Islands, UK, August.

Pascal Kobeh / Blacksaddle grouper (Plectropomus laevis) cleaned by a common cleaner fish (Labroides dimidiatus) Maldives. Indian Ocean.

Jack Perks / Ballan wrasse (Labrus bergylta) adult entering frame, investigating cave entrance, changing colour through metachrosis and leaving frame, Swanage Pier, Dorset, England, UK, English Channel, September.

Lewis Jefferies / Diverse array of algae species including Sargassum weed (Sargassum horneri), Kelp (Laminariales), Sea lettuce (Ulva lactuca) on shallow reef with juvenile Pollock (Pollachius pollachius) and Ballan wr...

Alex Mustard / Large Ballan wrasse (Labrus bergylta) swims over white and orange soft corals, Dead man's fingers (Alcyonium digitatum) and a Common sea urchin (Echinus esculentus) St Abbs, Eyemouth, Berwickshire...

David Fleetham / Bluestreak cleaner wrasse (Labroides dimidiatus) juvenile and adult inspecting a Black-blotched porcupinefish (Diodon liturosus) foraging on coral, off the island of Yap, Micronesia.

Alex Mustard / Portrait of a large male (sex determined by size) Ballan wrasse (Labrus bergylta) against green water. Farne Islands, Northumberland, England, United Kingdom. North Sea