Field Guide

Aquatic Invertebrates

Showing 1 - 10 of 21 results
Media
Photo of a bristly cave crayfish, viewed from the side.
Species Types
Scientific Name
Cambarus setosus
Description
The bristly cave crayfish is a whitish crayfish with small, unpigmented eyes and long, slender pincers with noticeable setae (bristles). It lives in caves in the Springfield Plateau region of the Ozarks.
Media
Photo of a papershell crayfish, also called calico crayfish.
Species Types
Scientific Name
Faxonius immunis (formerly Orconectes immunis)
Description
The calico crayfish is rather plain: gray-green with a pale central zone along the middle of the carapace and abdomen. The pincers are orange-tipped, and in mature males are tinged with purple. It is usually only found in the northern half of the state.
Media
Photo of a spothanded crayfish viewed from above on white background.
Species Types
Scientific Name
About 36 species in Missouri
Description
Crayfish are freshwater aquatic invertebrates that look a lot like small lobsters, to which they are related. There are about 36 species of crayfish in Missouri.
Media
Photo of a devil crayfish.
Species Types
Scientific Name
Lacunicambarus aff. diogenes (syn. Cambarus diogenes)
Description
The powerfully built devil crayfish is usually a uniform olive or tan, without obvious blotches or spots. It digs underground burrows, often with mud chimneys, and has a wide distribution.
Media
Photo of a digger crayfish.
Species Types
Scientific Name
Creaserinus fodiens (formerly Fallicambarus fodiens)
Description
The digger crayfish is heavy-bodied, reddish tan, with a pale, iridescent stripe along the midline of the abdomen and short, broad pincers. In Missouri, it is known from only a few locations, mostly in southeastern counties.
Media
Photo of a freckled crayfish.
Species Types
Scientific Name
Cambarus maculatus
Description
The freckled crayfish is powerfully built, yellowish tan, with numerous conspicuous black spots on its pincers, carapace, and abdomen. It is largely restricted to the Courtois Hills section of the Meramec River basin.
Media
Photo of a golden crayfish viewed through the surface of creek water.
Species Types
Scientific Name
Faxonius luteus (formerly Orconectes luteus)
Description
The golden crayfish varies in color from olive green to golden yellow. Many body parts are trimmed with red. A dark band crosses the head just in front of the cervical groove, and another crosses the carapace at its junction with the abdomen. It's a wide-ranging species.
Media
Photo of Hubbs' crayfish.
Species Types
Scientific Name
Cambarus hubbsi
Description
Hubbs' crayfish is powerfully built, olive tan or reddish brown, with a narrow blackish band where the carapace and abdomen join. It has a limited range within the Ozarks of southern Missouri and northern Arkansas.
Media
Photo of a longpincered crayfish.
Species Types
Scientific Name
Faxonius longidigitus (formerly Orconectes longidigitus)
Description
The longpincered crayfish is large and colorful, with very long, slender, blue-green pincers that are studded with prominent yellowish knobs. It is restricted to the White River basin in the Ozarks.
Media
Photo of an Ohio shrimp with small grayish pincers in the foreground.
Species Types
Scientific Name
Macrobrachium ohione
Description
Of Missouri’s two species of freshwater shrimp, the Ohio River shrimp is certainly the rarest. It was thought to be extirpated from our state but was rediscovered recently in the Mississippi River.
See Also

About Aquatic Invertebrates in Missouri

Missouri's streams, lakes, and other aquatic habitats hold thousands of kinds of invertebrates — worms, freshwater mussels, snails, crayfish, insects, and other animals without backbones. These creatures are vital links in the aquatic food chain, and their presence and numbers tell us a lot about water quality.