Orange or rusty

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brokenray

Arkansas Brokenray

Lampsilis reeveiana

Gray, speckled, translucent gelatinous blob cut in half to show structure

Bryozoans (Moss Animals)

Freshwater species in the phylum Bryozoa

Photo of a male Banded Pennant dragonfly

Dragonflies

Species in the suborder Anisoptera

elephant's ear

Elephantear

Elliptio crassidens

Endangered

elktoe

Elktoe

Alasmidonta marginata

fatmucket

Fatmucket

Lampsilis siliquoidea

Monkey Face Mussel

Freshwater Mussels

Bivalve molluscs in order Unionoida

giant floater

Giant Floater

Pygandon grandis

Photo of a painted devil crayfish standing on a sandy substrate

Painted Devil Crayfish

Lacunicambarus ludovicianus

pimpleback

Pimpleback

Quadrula pustulosa

pink mucket

Pink Mucket

Lampsilis abrupta

Endangered

plain pocketbook

Plain Pocketbook

Lampsilis cardium

Photograph of Purple Wartyback freshwater mussel shell exterior view

Purple Wartyback (Purple Pimpleback)

Cyclonaias tuberculata

Photo of a ringed crayfish.

Ringed Crayfish

Faxonius neglectus (formerly Orconectes neglectus)

round pigtoe

Round Pigtoe

Pleurobema sintoxia

image of a Carolina Grasshopper

Short-Horned Grasshoppers

About 620 species in North America

Photo of a spothanded crayfish viewed through creekwater.

Spothanded Crayfish

Faxonius punctimanus (formerly Orconectes punctimanus)

Photo of a pink planarian on a rock.

Turbellarians (Planarians; Free-Living Flatworms)

Species in genera Dugesia, Planaria, etc.

Photo of a northern, also called virile, crayfish.

Virile Crayfish (Northern Crayfish)

Faxonius virilis (formerly Oronectes virilis)

wabash pigtoe

Wabash Pigtoe

Fusconaia flava