Sessile Hydrozoans

Synthecium orthogonium

• Group: Other
• Typical depth: 6–33 m

This colonial hydroid grows on hard bottoms in shallow water between about 6 and 33 metres. Its branching stems carry paired feeding polyps that strain plankton from the current.

Taxonomy: Animalia › Cnidaria › Hydrozoa › Leptothecata › Syntheciidae › Synthecium

Species data via the World Register of Marine Species (WoRMS), AphiaID 285930.