Kingdom: Animalia
Class: Gymnolaemata
Order: Cheilostomata
Family: Reteporidae
Order: Cheilostomata
Family: Retporadae
Genus: Stylopoma
Species: About 3,500 but on 50 inhabit fresh water
The Body parts a bryozoa has is a body cavity and a simple gut. The animal looks like a weird flower. A bryozoa eats diatoms, green algae, cyanobacteria, non-photosynthetic bacteria, dinoflagellates, rotifers, protozoa, small nematodes, and microscopic crustaceans. A bryozoa species live in tropical waters at depths less than 100 metres (330 ft). However, a few have been found in deep-sea trenches, especially around cold seeps, and others near the poles. The great majority are sessile. Encrusting forms are much the commonest of these in shallow seas, but erect forms become more common as the depth increases. A few marine species can move, and an Antarctic species forms floating colonies. The phylactolaemates live in all types of freshwater environment lakes and ponds, rivers and streams, and estuaries.
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