no photo — written note
Insects
Sturdy mussel with heavy ridges running across the shell.
Field facts
HabitatLarge rivers, reservoirs
RangeStatewide
When to lookYear-round
StatusSecure (Indiana DNR / IUCN Red List)
Look-alikesWabash Pigtoe, Giant Floater
Field note: Its shell was punched into pearl buttons by the millions a century ago.
Lesson
Watching responsibly
Once harvested for buttons; today collecting live mussels is illegal.
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