Description: English: Menippe mercenaria (Say, 1818) - Florida stone crab claw, modern (latest Holocene) The crustaceans are a large group of arthropods that inhabit marine, marginal marine, freshwater, and terrestrial habitats. The crustaceans include crabs, lobsters, shrimp, crayfish, barnacles, ostracods, and other organisms. The oldest fossil crustaceans are in the Cambrian. The group experienced a significant radiation in the oceans during the Mesozoic Marine Revolution. Seen here is a Florida stone crab claw. This species occurs in the Gulf of Mexico and the western portions of the North Atlantic Ocean. Classification: Animalia, Arthropoda, Crustacea, Malacostraca, Decapoda, Brachyura, Menippidae (or Xanthidae) Locality: southern end of the western shoreline of Cayo Costa Island, western side of Pine Island Sound, offshore from the Gulf of Mexico coast of southern Florida, USA More info. at: en.wikipedia.org/wiki/Crustacean and en.wikipedia.org/wiki/Florida_stone_crab. Date: 13 April 2020, 17:55:00. Source:
https://www.flickr.com/photos/47445767@N05/49774499508/. Author: James St. John.