Spiral Bryozoan

Each colony of the bryozoan is shaped similar to an evergreen tree, and is coloured light brown. It reproduces sexually, and after fertilization will form a planktonic larvae that settles in the subtidal zone. It grows through budding or cloning, to grow in a spiral pattern off the main axis. It is a main food source of th Clown Nudibranch (Triopha catalinae), and other nudibranchs including the Frosted Nudibranch (Dirona albolineata), and the White and Orange-tipped Nudibranch (Janolus fuscus).  The bottom of the stalks are mostly darker, dead zooids (an individual of the bryozoan colony). A specialized zooid called Avicularium that looks similar to a bird-head keeps other organisms from resting on and growing on the bryozoan. They will also catch small crustaceans and bring it to the mouth of the zooids to feed it.