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

Sue Daly / Long legged spider crab (Macropodia) walking across the seabed, Sark, British Channel Islands, UK, June.

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.

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

Wild Wonders of Europe / Mollers / Female Pink crab spider (Thomisus onustus) with moth prey, San Marino, May 2009. Wild Wonders kids book.

Wild Wonders of Europe / Lundgren / Long-legged spider crab (Macropodia rostrata) on a new kelp leaf, Moere coastline, Norway, February 2009

Juergen Freund / Arrow crab on sponge (Stenorhynchus seticornis) Caribbean

Juergen Freund / Decorator spider crab {Camposcia refusa}. Indo-Pacific

Juergen Freund / Arrow crab on brain coral {Stenorhynchus seticornis} Caribbean Sea, Cuba

Jeff Rotman / Spider crab {Schizophrys sp} on soft coral {Dendronepthya sp} Bismarck sea, Papua New Guinea

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