Claudio Contreras / Leopard grouper (Mycteroperca rosacea), yellow morph, IUCN Vulnerable, Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Claudio Contreras / Gulf grouper (Mycteroperca jordani), IUCN Endangered, Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Claudio Contreras / Panamic sergeant major (Abudefduf troschelii), Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Claudio Contreras / Panamic sergeant major (Abudefduf troschelii), Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Claudio Contreras / Cortez damselfish (Stegastes rectifraenum) juvenile, Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Juan Carlos Munoz / Group of male Common eiders (Somateria mollissima) in flight, Iceland, June.

Juan Carlos Munoz / White-tailed eagle (Haliaeetus albicilla) in flight, Norway, April

Juan Carlos Munoz / Magnificent frigate bird (Fregata magnificens) in flight, Isla Holbox, Yucatan Peninsula, Mexico.

Juan Carlos Munoz / Group of five Brown pelicans (Pelecanus occidentalis) in flight, Isla Holbox, Yucatan Peninsula, Mexico.

Juan Carlos Munoz / Two juvenile Atlantic yellow legged gulls (Larus michahellis) in flight, Izmir, Turkey, October.

Juan Carlos Munoz / Two Common ravens (Corvus corax) in flight, Powys, Wales, February.

Juan Carlos Munoz / Common seal (Phoca vitulina) swimming underwater, Spain, December.

Adrian Davies / Sea hare with newly laid eggs {Aplysia punctata} Wales, UK, Europe

Jeff Rotman / California seahare {Aplysia californica} California Pacific ocean USA

Jose B. Ruiz / Seahare {Aplysia punctata} nudibranch feeds on algae. When disturbed ejects purple defensive 'ink'. Mediterranean Spain

Adrian Davies / Sea hare with newly laid eggs, Wales, UK

Jane Burton / Sea hares (Aplysia punctata) spawning among seaweed, Atlantic coast, captive

Joel Sartore / Photo Ark / California sea hare (Aplysia californica) portrait, Research Experience and Education Facility (REEF) of the University of California. Captive.

Joel Sartore / Photo Ark / California sea hare (Aplysia californica) portrait, Research Experience and Education Facility (REEF) of the University of California. Captive.

Henley Spiers / Sea hare (Aplysia punctata) with striking red colouration, rising up on a blade of kelp, Shetland, Scotland, UK. July.

Lewis Jefferies / Seahare (Aplysia punctata) crawling around a Common eelgrass (Zostera marina) meadow, Helford River Estuary, Cornwall, UK, May.

Alex Mustard / A large herbivorous Seahare (Aplysia punctata) crawling around a Common eelgrass (Zostera marina) meadow, Helford River Estuary, Cornwall, UK.