Content tagged with "Aquatic Invertebrates"

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

Horse and Deer Flies

image of Horse Fly on tree trunk
Tabanus, Chrysops, and related genera
Meet the horse fly: Stealthily, one will land on your back, slice your skin, and lap your blood. By the time it starts to hurt and you swat at it, the painful, itchy welt is rising. 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


Various species in the genus Hydra
We’ve all seen aquariums and pictures of tropical saltwater invertebrates such as corals, jellyfish and anemones—but did you know that there are similar creatures living in the freshwater habitats of 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


Toxolasma parvus
These diminutive mollusks are the smallest of Missouri’s freshwater mussels. More

Long-Pincered Crayfish

Image of a long-pincered crayfish
Orconectes longidigitus
This large, colorful crayfish--restricted to the White River basin in the Ozarks--is characterized by very long, slender, blue-green pincers that are studded with prominent yellowish knobs. More

Lunged Aquatic Snails (Pulmonate Pond Snails)

Photo of pulmonate snail crawling on rock
Over 30 Missouri species in former subclass Pulmonata
This is one of the two broad categories of aquatic snails in Missouri (the other is the gilled snails, or prosobranchs). Pulmonate snails breathe via a lunglike pulmonary cavity, and they lack a hard trapdoor-like operculum. Except for in the Ozarks, pulmonate snails predominate in most of the aquatic regions in our state. More

Mammoth Spring Crayfish

Image of a mammoth spring crayfish
Orconectes marchandi
This species has a very localized distribution: In our state, it's found only in the Warm Fork of Spring River, in Oregon County. This crayfish is reddish-brown and its broad, powerful pincers have numerous blackish specks on their basal parts. More