Wild Wonders of Europe / Lundgren / Atlantic cod (Gadus morhua) portrait, Saltstraumen, Bod, Norway, October 2008

Niall Benvie / Spoof warning sign about scarcity of cod in the sea, Aberdeenshire, Scotland, UK

Florian Graner / Atlantic cod (Gadus morhua) swimming along seabed, Norway

Michael Pitts / Pouting / Bib {Trisopterus luscus} Channel Islands, UK

Doug Allan / Shoal of Atlantic cod (Gadus morhua) in fish pen. Norway, Scandinavia, Europe

Florian Graner / Atlantic cod {Gadus morhua} Tysfjord, Berents Sea, Norway

Nick Hawkins / An Atlantic polluck (Pollachius pollachius) swimming over a patch of eelgrass (Zostera marina). Nova Scotia, Canada. September

Shane Gross / Invasive lionfish (Pterois volitans) on the end of a spear. Florida, USA. February 2018. In order to keep their numbers low, scuba divers and snorkellers are encouraged to spear as many as possible.

Pascal Kobeh / Larger forkbeard (Phycis phycis) hiding in a crack or overhang, Azores, Atlantic Ocean.

Pascal Kobeh / Larger forkbeard (Phycis phycis) hiding in a crack or overhang, Azores, Atlantic Ocean.

Five Films / Tracking shot of a Northern gannet (Morus bassanus) flying over the sea, English Channel, near Salcombe, Devon, UK, November 2016.

Five Films / Tracking shot of a Northern gannet (Morus bassanus) flying over the sea, English Channel, near Salcombe, Devon, UK, November 2016.