Description: An encrusting bryozoan which forms extensive sheets on exposed rocky surfaces in the shallow sublittoral zone. The zooids are arranged in an irregular pattern and the colony usually has a bumpy surface.

Habitat: Very common in depths of 20-50 m on rockfaces and large boulders.

Distribution Map from NBN: Parasmittina trispinosa at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Parasmittina trispinosa at iNaturalist World Species Observations database.