Sergio Hanquet / Arrow crab (Sternorhynchus lanceolatus). Tenerife, Canary Islands.

Pascal Kobeh / Aggregation of thousands of Spider crabs (Leptomithrax gaimardii) for moulting, South Australia Basin, Australia. Pacific Ocean.

Pascal Kobeh / Aggregation of thousands of Spider crabs (Leptomithrax gaimardii) for moulting, South Australia Basin, Australia. Pacific Ocean.

Linda Pitkin / 2020VISION / Spiny spider crab (Maja brachydactyla / squinado) pair on rock covered with red algae, Lundy Island Marine Conservation Zone, Devon, England, UK, May.

Alex Mustard / 2020VISION / Great spider crab (Hyas araneus) on Deadman's fingers (Alcyonium digitatum) coral, feeding in a current, Loch Carron, Ross and Cromarty, Scotland, UK, April

Toby Roxburgh / 2020VISION / Fishermen aboard a small fishing boat packing a container full of Spiny spider crabs (Maja Squinado), caught using tangle nets, Cornwall, England, UK, June 2011

Alex Mustard / 2020VISION / Aggregation of Spider crabs (Maja squinado) in shallow water off Burton Bradstock, Dorset, UK, August. 2020VISION Book Plate.

Alex Mustard / 2020VISION / Long legged spider crab (Macropodia rostrata) on Dead man's fingers (Alcyonium digitatum). Loch Carron, Ross and Cromarty, Scotland, UK, April

Alex Mustard / 2020VISION / Leach's spider crab (Inachus phalangium) sheltering from the current beneath tentacles of Snakelocks anemone (Anemonia viridis) Selsey, West Sussex, UK, May

Graham Eaton / Spiny Spider Crab (Maja squinado) with claws raised in an aggressive posture, in a fast tide, Abersoch, Wales, UK, May.

Jeff Rotman / Japanese Giant Spider Crab (Macrocheira kaempferi) World's Largest Crustacean in Tokyo Aquarium, Japan.

Wild Wonders of Europe / Zankl / Spiny spider crab (Maja squinado) on seaweed, Malta, Mediteranean, May 2009