Floral Egg Crab

Atergatis floridus has an oval, relatively narrow carapace which has a smooth surface and smooth margins. The carapace is greenish or greenish-blue-brown and is marked with a pattern which resembles lace and is made up of a fine network of fine white or yellow lines, resembling a shawl. It has large claws which are equal sizes and which are smooth with black spoon-shaped tips and which may be larger in males than females. The pereiopods are squarish in shape and quite thick with lilac edges and lack hair. The width of the carapace is 8–10 cm (3.1–3.9 in). The carapace is approximately 1.4 times broader than it is long.

Atergatis floridus occurs in the eastern Indian Ocean from south east Asia, south to Australia where it reaches Rottnest Island in Western Australia and possibly Sydney in the east, its range extends eastwards across the western pacific as far as Hawaii.