CR

Epioblasma torulosa

Declining

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

The tubercled blossom pearly mussel faces severe threats from dam construction and river channelization that have fragmented and altered its riverine habitat throughout the Ohio River basin. Water pollution from agricultural runoff, industrial discharge, and urban development has degraded water quality in remaining populations. The species' complex reproductive cycle, which requires specific fish hosts for larval development, makes it particularly vulnerable to disruptions in aquatic ecosystems and declining fish populations.

Threat summary

Habitat

This freshwater mussel inhabits clean, flowing waters of medium to large rivers with stable gravel and sand substrates. It was historically found in the Ohio River system and tributaries, preferring areas with moderate current and good water quality.

FRESHWATER· major

Conservation measures underway

Species managementSpecies recovery