Peter Cairns / naturepl.com / Two Greylag geese {Anser anser} in field, Scotland, UK, June

Fred Bavendam / Blue-barred Parrotfish (Scarus ghobban) male sleeping on the reef at night, Andaman Sea, Thailand

Pete Oxford / Blue-chin Parrotfish (Scarus ghobban) Wolf Island in the northern archepelago, Galapagos Islands, Equador, South America

Fred Bavendam / Blue-barred Parrotfish (Scarus ghobban), Andaman Sea, Thailand

Jeff Rotman / Bluebarred Parrotfish (Scarus ghobban) sleeping in rock crevice protected by mucus membrane. Egypt, Red Sea.

Fred Bavendam / Blue-barred Parrotfish (Scarus ghobban) pectoral fin of a male as it sleeps on the reef at night, Andaman Sea, Thailand

Fred Bavendam / Blue-barred Parrotfish (Scarus ghobban) male sleeping on the reef at night, Andaman Sea, Thailand

Chris Newbert / Blue-barred Parrotfish (Scarus ghobban) tail detail, Red Sea, Egypt