Here's Crisia spp. (White Tuft Bryozoans), a new one for me.
Encrusted on some tube worm shells 1774209.
The white one, please.
The (Fibonacci?) patterns on this 1" across Rhynchozoon rostratum (Yellow Encrusting Bryozoan) are attractive up close.
This 4" wide Membranipora villosa (Kelp-encrusting Bryozoan) had some tiny barnacles growing on it, and was fraying a bit, like old lace.
The Bryozoa, also known as Polyzoa, Ectoprocta or commonly as moss animals, are a phylum of aquatic invertebrate animals. Typically about 0.5 millimetres (0.020 in) long, they are filter feeders that sieve food particles out of the water using a retractable lophophore, a "crown" of tentacles lined with cilia. Most marine species live in tropical waters, but a few occur in oceanic trenches, and others are found in polar waters. One class lives only in a variety...