All the species in the family are found in a close symbiosis with cnidarians.

They are found across the Indo-Pacific, and can best be identified to the species level by the colour patterns they display.

[2] Members of the family Tetraliidae were previously included in the Trapeziidae, but the similarities between the taxa is the result of convergent evolution.

[3] The World Register of Marine Species lists the following subfamilies and genera:[1] Calocarcininae Stevcic, 2005 Quadrellinae Stevcic, 2005 Trapeziinae Miers, 1886

This Eubrachyura article is a stub.