Libinia emarginata
Libinia emarginata, the portly spider crab, common spider crab or nine-spined spider crab, is a species of stenohaline crab that lives on the Atlantic coast of North America. Wikipedia
Scientific name: Libinia emarginata
Class: Malacostraca
Genus: Libinia
Family: Epialtidae
Order: Decapoda
Phylum: Arthropoda