Freshwater Nerite - Theodoxus fluviatilis

Alternative names
River Nerite

Shell size 4 to 8 mm. The shells are very attractively and highly patterned but are very variable in appearance, usually having a combination of creamy white and dark browns.

Identification difficulty

Found in lakes, rivers and streams – even in slightly brackish water.

When to see it

All year round.

Life History

This species is an algae eater.

UK Status

Widespread and fairly frequent in central and southern England, less common elsewhere in Britain.

VC55 Status

Uncommon, or under-recorded, in Leicestershire and Rutland.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map