Description:
Green porcelain crabs in the Atlantic reach 0.4 - 0.6 inches carapace width, though specimens from the Pacific grow somewhat larger.  These small, flat crabs are typically  orange-brown to dark brown as adults.  Juveniles are similarly colored, but have a lighter, speckled appearance.  Mature specimens have mouthparts pigmented in a brilliant blue as shown in the bottom right photo.  Chelae are elongate, flattened, and equal.  There are 3 marginal spines on the anterior merus of the chelae, as indicated by the arrow in the top right photo.  As is characteristic for all porcelain crabs, the antennae are inserted external to the eyes, not between them as is observed in most other crab families.

Habitat:
Green porcelain crabs inhabit many different shallow intertidal and subtidal habitats.  They can be especially common in rock rubble, oyster reefs and among dock pilings. 

Similar Species:
Green porcelain crabs superficially resemble other porcelain crabs found in the Indian River Lagoon;  however the characteristic blue mouthparts, and a distinct orange spot that can be observed on the chelae when they are open, set this species off from others.

Range:  
Green porcelain crabs are found in both the Atlantic and Pacific Oceans.  Their range in the Atlantic extends from South Carolina south through the Gulf of Mexico to Brazil, including Bermuda, the West Indies and the Caribbean.  They are also known in West African waters.  In the Pacific, they range from the Gulf of California south through Peru.