Found to depths of around, the longspine ponyfish forages on the sea floor, generally in murky environs, consuming fish, crustaceans, arrow worms, nematodes, and shellfish such as bivalves, and gastropods.
12.
Many other phyla are found there : Porifera ( sponges ) and Priapulida ( burrowing worms which were ambush predators ), Brachiopoda ( these had bivalve-like shells, but fed by means of a lophophore, a fan-like filter which occupied about of half of the internal space ), Chaetognatha ( arrow worms ), Cnidaria, Ctenophora ( comb jellies ), Echinodermata, Hyolitha ( Lophophorata with small conical shells ), Nematomorpha, Phoronida ( horseshoe worms ), and Protista.
