Description: This plumulariid has a main stem which may be unbranched, but normally branches a few times in larger specimens. The side-branches are long, decreasing in length towards the top of the colony to give an overall outline which is oval in shape. They arise in a double series on opposite sides of the main stem, with a second double series of shorter branches on the frontal side and in the mid-region of most colonies. The reproductive polyps are white and clustered at the bases of the side branches in the middle of the colony. Typically 100 mm tall with side branches 30 mm long.

Habitat: In deep water, usually below 20 m and more common below 30 m in moderate tidal streams and moderate to exposed sites.

Ecology: The nudibranch Doto hystrix is a specific predator of this hydroid, living on the main stem near the base of the colony and spawning on the stem.

Distribution: Widely distributed on western coasts of Britain and Ireland but rather local in its occurrence.

Similar Species: In some habitats large specimens of Kirchenpaueria pinnata may resemble this species. They differ in having shorter side branches giving a parallel sided appearance to the colonies, and more delicate main stems.

Key Identification Features:

• White coloured colony with stout main stem and long side branches.
• Usually a second set of side branches arising from the main stem in the centre of the colony.
• Entire colony blackens on drying or preservation in alcohol.

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

iNaturalist: Schizotricha frutescens at iNaturalist World Species Observations database.

WoRMS: Schizotricha frutescens at World Register of Marine Species. Accepted name: Schizotricha frutescens (Ellis & Solander, 1786). AphiaID: 117636.

Classification: Biota; Animalia; Cnidaria; Medusozoa; Hydrozoa; Hydroidolina; Leptothecata; Plumularioidea; Schizotrichidae; Schizotricha