Biology/Natural History: The nudibranch Dialula sandiegensis feeds on this sponge. Disassociated cells may reaggregate but have not been seen to form a new sponge. Sexual reproduction is in the spring; produces a parenchymula larva. The genus Haliclona contains more than 200 species which are hard to distinguish, even microscopically by spicules. They may actually be easier to distinguish in life than by spicules.