Semi-Ribbed Spire Snail

Onoba semicostata

• Group: Other
• Typical depth: 0–1000 m

This minute spire snail lives on hard ground, its tiny ribbed shell only a few millimetres tall. It ranges from the shoreline down to around 1,000 metres, grazing the films of algae and detritus that coat rock and shell.

Taxonomy: Animalia › Mollusca › Gastropoda › Littorinimorpha › Rissoidae › Onoba

Species data via the World Register of Marine Species (WoRMS), AphiaID 141320.