"VWR"

These common worms are also referred to as Red Wigglers.

Wax worms are a hardy larvae that are easy to handle.

Mendel’s Law of Independent Assortment made easy.

Classic experiment to demonstrate crossing over.

A quick and colorful demonstration of Mendel’s Law of Segregation.

Create a suitable home for fish, brine shrimp and other marine invertebrates. A 450 g bag will make three gallons of sea water (1.020-1.025 specific gravity). (Please note: This item is recommended for use with saltwater aquaria only.)

The culture supplied includes copepods in various stages of development.

Highly aggressive. Beautiful but socially challenged, male “Siamese fighting fish” will duel with each other — or even with their own reflection in a mirror — and flare their colorful fins in an impressive display of territoriality. When females are present, males will try to “impress” them. Females can coexist; males must be kept separate. Care instructions are included. Size: 1 1/2–2".

Easily compare the different types of structures in a variety of small freshwater crustaceans with this convenient freshwater culture mix.

Planorbids, mixed genera. Compare these attractive, spiral-shelled, herbivorous freshwater specimens with other snails. They will eat aquarium plants

These organisms help keep your freshwater aquarium clean by eating algae and detritus; they won’t eat any plants included in the aquarium.

Predatory. Feeds on Paramecium caudatum. Hay medium.

Characterized by cilia; nearly all possess two types of nuclei.

Scouring Rush. It features reedy, upright growth habit and whorls of leaves at the nodes. The shoots, which contain silica, were once used to scrub utensils and pots, giving Equisetum its common name of scouring rush. It is supplied in a plastic bag with care instructions. Quantity: 8–12 shoots.

Crayfish are a mixture of Orconectes immunis and Orconectes virilis.

This large predatory frog will eat any other organism smaller than itself, including smaller bullfrogs; keep similar-sized frogs together to avoid cannibalism.

Two flagella; no chloroplasts. Food organism. Hay medium.

Characterized by flagella; lacks plastids.