This is a flightless, nocturnal beetle. It is very rounded and the colour of the animal is related to the colour of the sand in which it lives, so it can be white to black and any colour of sand in between. The third pair of legs has been adapted for burrowing.

Lives at the very top of the intertidal zone where it burrows into the sand around marine debris.

It feeds on drift seaweed.

It appears that the beetle has an internal biological clock tuned to the spring/neap tidal cycle which controls both the arrival of new seaweed food and the position of it on the beach.