"water bath"

These red marine bivalves are fascinating to observe as they propel themselves forward by expelling jets of water.

This organism is commonly found in soil and water, and is also associated with spoiled food. It produces a diffusible fluorescent pigment.

This organism is commonly recovered from soil and water. As normal intestinal flora, it can also usually be found in sewage.

This organism is commonly isolated from sewage, water, soil and dairy products, as it is a normal part of intestinal flora.

Unusual well-formed sedimentary bodies believed to have formed from the aggregates of algal organisms and cyanobacteria in ancient waters.

Test cylindrical, covered with sand granules. Soil-water medium.

Characterized by pseudopods; with or without a shell (test).

This species of Rhodospirillum is commonly isolated from stagnant water and mud. It is especially interesting because it produces a red pigment and is also capable of photosynthesis.

Freshwater. Filamentous; H-shaped cell walls. Soil-water medium.

Characterized by green plastids and cell walls composed of cellulose.

Red-pigmented halophile from evaporating salt ponds; requires 25% salt medium, lyses easily in plain water, releasing DNA.

Pimephales promelas. Nonaggressive. Highly adaptable and easy to maintain, minnows make good water pollution indicators. Care instructions are included. Size: 2". Package of six.