Ritter's brooding anemone

Epiactis ritteri is very flat when retracted with a wide, flared pedal base, and can measure 5 cm (2 in) wide and 1 cm (0.4 in) high. The column is unarmed with acontia and has no tubercles, but has some small adhesive warts to which sand or other fragments may stick. There may be radiating lines on the pedal disc at the base of the column. There are broad white markings on the oral disc near the base of the tentacles but these do not extend as far as the mouth, a fact which distinguishes it from the rather similar Epiactis prolifera. The general colour of this anemone is reddish-brown to brown.