Lithoscaptus aquarius (photo from aquarium), author: van der Meij, Sancia E.T.
Spinkrab - Maja brachdactyla
Calcinus minutus1 DMS, author: ReefLifeApps.com
Carcinus maenas megalopa, author: Fisheries and Oceans Canada, Monica Bravo

DecaNet (World List of Decapoda)