Content tagged with "aquatic"

Belted Crayfish

Image of a belted crayfish
Orconectes harrisoni
This medium-small, tan crayfish — found only in the Big River and its tributaries — has a distinctive pattern of alternating olive-green and reddish-brown bands on the abdominal segments. More

Big Creek Crayfish

Image of a big creek crayfish
Orconectes peruncus
This moderately small, brown crayfish has a very localized distribution centered in Big Creek and its tributaries, in the St. Francis River basin. It lacks bright colors, but blackish specks and blotches occur over the top surfaces of the body and pincers. More

Devil Crayfish

Image of a devil crayfish
Cambarus diogenes
This powerfully built crayfish is usually a uniform olive or tan, without obvious blotches or spots. Occasional individuals are blue, with yellowish stripes on the abdomen and bright red outlining many body parts. It is found throughout much of the eastern United States. More

Ditch Fencing Crayfish (Shield Crayfish)

Photo of ditch fencing crayfish
Faxonella clypeata
This small, tan crayfish has a pattern of paired blackish dashes along the surface of the carapace and abdomen. The pincers are narrow and cylindrical, with short, abruptly tapering fingers. Sometimes called the shield crayfish, in our state, it's found only only in the southeast, from Ripley County to southern Bollinger County. More

Freckled Crayfish

Image of a freckled crayfish
Cambarus maculatus
Largely restricted to the Courtois Hills section of the Meramec River basin, this powerfully built, yellowish-tan crayfish has numerous conspicuous black spots on its pincers, carapace and abdomen. More

Gilled Aquatic Snails (Prosobranch Pond Snails)

Photo of a gilled aquatic snail
Over 20 Missouri species in former subclass Prosobranchia
Gilled snails are one of two main groups of aquatic snails in Missouri (the other group is the "lunged" snails). Gilled snails, or prosobranchs, breathe with gills and possess a hard trapdoor-like operculum. They are most common in the Ozarks. More

Golden Crayfish

Image of a golden crayfish
Orconectes luteus
This wide-ranging species is quite variable in color, but it is typically olive-green suffused with golden yellow. The antennae and many body parts are trimmed with bright 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. More

Gray-Speckled Crayfish

Image of a gray-speckled crayfish
Orconectes palmeri
This crayfish is gray with numerous greenish-black speckles and blotches on the pincers, carapace and abdomen. A pair of large blotches are present near the back of the head, and another pair occur near the junction of the carapace and abdomen. In our state, it is found only in the southeastern section. More

Hubbs' Crayfish

Image of hubbs' crayfish
Cambarus hubbsi
This powerfully built crayfish is usually olive-tan or reddish brown, without prominent spots or blotches. A narrow blackish band is present at the junction of the carapace and abdomen. In our state, it is limited to the Ozarks of southern Missouri. More


Photo of a leech
Various species in the subclass Hirudinea
It’s hard not to be repulsed by leeches! But once you get past the fact that many species are parasitic bloodsuckers, you will discover that they are fascinating creatures. More