eat undercooked fish.
This group of organisms do not moult, and are characterized by having a lophophore (for feeding) and a trochophore (larva with a ring of cilia around the middle). They are:
active transport of ions, followed by water coming in by osmosis
adding commercial fertilizers
Cnideria (stinging-celled animals)
Anthozoa (sea anemones and corals)
between mesoderm and endoderm