Nick Hawkins / European green crab (Carcinus maenas), an invasive species in North America, Kejimkujik Seaside National Park, Nova Scotia, Canada. July.

Doc White / California sea otter (Enhydra lutris) feeding on Northern kelp crab, Monterey Bay, California, USA, Eastern Pacific Ocean, May

Juergen Freund / Mud crab (Scylla serrata) in shallow sandy water. Split level with island and thatched house on stilts. Moromahu Island, Wakatobi, South Sulawesi, Indonesia. Second Place in the Portfolio Award of the...

Christophe Courteau / Velvet swimming crab portrait {Liocarcinus / Necora puber} Brittany France

Linda Pitkin / 2020VISION / Velvet Swimming Crab (Necora puber / Liocarcinus puber), St Abbs (St Abbs and Eyemouth Voluntary Marine Reserve), Berwickshire, Scotland, UK, October, 2011

Juergen Freund / Horsehoe crab (Tachypleus gigas) swimming on its back with gills creating the propulsion, Palawan, Philippines. Did you know? Horseshoe crabs are more closely related to spiders than crabs.

Graham Eaton / Velvet swimming crab (Necora puber) pair mating, Trefor, Wales, UK, July.

Anup Shah / Crab eating / Long tailed macaque (Macaca fascicularis) swimming, Sumatran Coast, Indonesia

Anup Shah / Crab eating / Long tailed macaque (Macaca fascicularis) swimming, Sumatran Coast, Indonesia

David Hall / Swimmer crab (Lissocarcinus laevis) living commensally with Anemone (Actinodendridae). Pantar, Alor Archipelago, Indonesia.

Nick Upton / Velvet swimming crab (Necora puber) in a rock pool, hiding among Coralweed (Corallina officinalis), Cornwall, UK, March.

Nick Upton / Common shore crab (Carcinus maenas) hiding among Coralweed (Corallina officinalis) in a rock pool, Cornwall, UK, March.