The Caudofoveata are a relatively obscure class of mollusc and for a long time they were not even recognised as molluscs at all. They are exclusively marine and are found at depths of more than 20m burrowed in muddy sediments. Relatively little is known about them as little work has been done on live animals. They are generally only picked up in dredge or grab samples which have been preserved. They live in burrows formed by pushing the head down through the sediment by a series of muscular contractions and expansions.
They appear to feed on micro-organisms and organic matter found in the sediment. The particles are selected by the foot shield, broken up by the radula before being injested through the mouth.
They have one pair of gills at the posterior end of the animal which project above the surface of the sediment and extract oxygen from the water. If the animal is disturbed the gills are retracted and the animal descends into the burrow.
The sexes are separate with eggs and sperm being relased freely into the water where fertilisation occurs. Nothing is currently known of the larval development.