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 / Skeleton shrimp (Caprella linearis) living within the polyps of Dead man's fingers soft coral. Bard Cave, Bressay, Shetland Islands, Scotland, UK, June

Alex Mustard / 2020VISION / Masked crab (Corystes cassivelaunus) on sandy seabed, Studland Bay, Dorset, UK, May

David Shale / Decapod {Systellaspis sp} from midwater catch 195-498m, Mid-Atlantic Ridge, North Atlantic Ocean

Juan Carlos Munoz / Crab walking over beach leaving tracks in the wet sand, Floreana Island, Galapagos, January

Solvin Zankl / Anomuran larva of a Hermit crab, Atlantic ocean

Solvin Zankl / Deepsea planktonic megalopa stage of crab development, Atlantic ocean.

David Shale / (Neolithodes sp) a benthic, deep sea crab., deep sea Atlantic ocean

David Shale / Deepsea Snipe eel (Nemichthys sp), Feeds on decapods., deep sea Atlantic ocean

Jeff Rotman / Symbiotic shrimp on basal disc of sea anemone, Red Sea

Sergio Hanquet / Red-backed cleaner shrimp (Lysmata grabhami) head, close up. Tenerife, Canary Islands.

Shane Gross / Channel clinging crab (Mithrax spinosissimus), Eleuthera, Bahamas.