calico crayfish images - Joel Sartore

A calico crayfish (Faxonius immunis) collected at Oak Lake, Lincoln, NE.

A calico crayfish (Faxonius immunis) collected at Oak Lake, Lincoln, NE.

A calico crayfish (Faxonius immunis) collected at Oak Lake, Lincoln, NE.

Calico crayfish (Orconectes immunis) from the wild.

Calico crayfish (Orconectes immunis) from the wild.

Calico crayfish (Orconectes immunis) from the wild.

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National Geographic Photographer and Speaker