Bug Identifier
Inland Floater (Glochidia Larvae Shells)
Community identification

Inland Floater (Glochidia Larvae Shells)

Pyganodon grandis (Glochidium)

Order & Family
Order: Unionida, Family: Unionidae
Size
250 to 400 micrometers (microns) for larvae; adults reaching 10-15 centimeters.
See this bug in the Encyclopedia

Natural Habitat

Freshwater lakes, ponds, and slow-moving rivers; larvae are typically found attached to the gills or fins of fish hosts.

Diet & Feeding

Larvae are parasitic and absorb nutrients from the host fish's bodily fluids; adults are filter feeders consuming plankton and organic detritus.

Behavior Patterns

Larvae are released into the water by the mother and must find a specific fish host to attach to. They encyst on the host for several weeks before dropping off as juveniles to live in the sediment.

Risks & Benefits

Adults provide significant ecological benefits by filtering and cleaning water. The larvae pose minimal risk to healthy fish populations but can cause stress in high concentrations in aquaculture.