Sessile Hydrozoan

Dynamena quadridentata

• Group: Other
• Typical depth: 0–256 m

This small colonial hydroid grows over other surfaces in tidal inlets, sounds and caves, and turns up among floating Sargassum at the surface. Its low ranks of polyps form a living crust that filters food from the moving water.

Taxonomy: Animalia › Cnidaria › Hydrozoa › Leptothecata › Sertulariidae › Dynamena

Species data via the World Register of Marine Species (WoRMS), AphiaID 117889.