Content tagged with "Aquatic Invertebrates"

Photo of a Cajun dwarf crayfish.

Cajun Dwarf Crayfish

Cambarellus puer
The Cajun dwarf crayfish is small, reddish brown to gray, with a paired series of dark, wavy stripes or dashes along the dorsal surface. In Missouri, it occurs in our southeastern lowlands.

Read more

Chinese Mystery Snail

Cipangopaludina chinensis malleata
The Chinese mystery snail is an invasive species quickly taking over urban waters throughout the state. These Asian snails are popular with aquarium hobbyists, and some people appreciate them as food.

Read more

Photo of a coldwater crayfish.

Coldwater Crayfish

Orconectes eupunctus
The coldwater crayfish has a very localized distribution in the Eleven Point and Spring River drainages. It is stout, with a blue-green head and pincers and dark, rust-brown carapace. It is an imperiled species.

Read more

image of Crane Fly clinging to a twig

Crane Flies

There are over 500 species of crane flies in North America.
Many people are frightened of crane flies, which resemble huge mosquitoes. But crane flies don’t bite or suck blood. In fact, as adults, most of them don’t have mouths at all!

Read more

Photo of a spothanded crayfish viewed from above on white background.


Cambarus, Orconectes, Procambarus, and 3 other genera in MO.
Crayfish are freshwater aquatic invertebrates that look a lot like small lobsters, to which they are related. There are about 35 species of crayfish in Missouri.

Read more

Photo of an adult damselfly on a twig next to water.


Species in the suborder Zygoptera
Like their close relatives the dragonflies, damselflies have long bodies, two pairs of long, membranous, finely veined wings, and predaceous aquatic larvae that have extendible mouthparts. Damselflies typically hold their wings together, above the body.

Read more



Truncilla truncata
A common mussel in some areas, deertoe have decorative green markings.

Read more

Photo of a devil crayfish.

Devil Crayfish

Cambarus diogenes
The powerfully built devil crayfish is usually a uniform olive or tan, without obvious blotches or spots. Some, in southeast Missouri, are turquoise blue with red highlights. It digs underground burrows, often with mud chimneys, and has a wide distribution.

Read more

Digger Crayfish

Fallicambarus fodiens
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.

Read more

Photo of a male Banded Pennant dragonfly


Species in the suborder Anisoptera
Like their close relatives the damselflies, dragonflies have long bodies, two pairs of long, membranous, finely veined wings, and predaceous aquatic larvae. Dragonflies typically hold their wings stretched outward, horizontally.

Read more