"Freeze-Dried Specimens"

These bottom-dwelling bivalved crustaceans are found in nearly every aquatic habitat.

Poecilia reticulata.

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

Crayfish are a mixture of Orconectes immunis and Orconectes virilis.

Brachydanio rerio.

The nocturnal hermit crab uses “borrowed” shells to protect its relatively soft body, changing shells as it grows larger.

Choose from 2 popular sets of Tetras for your fish tank.

Related to the starfish, but easier to maintain, the serpent star features a central disc and five very flexible arms.

Cucumaria sp. These creatures have oral tentacles used to catch food and then pull the food into its body to digest.

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".

Poecilia reticulata.

Limulus polyphemus. A true "living fossil", this representative of the class Meristomata is one of only five living still in existence. The crab is the most widely studied Meristomata because of their large compound eyes and their copper-based blue blood. It thrives in a marine aquarium such as WARD’S Marine Touch Tank. Culture instructions are included. Size: 1–3". Note: Shipped overnight. Additional shipping fee applies.

Mixed genera. Also known as scuds, amphipods are freshwater crustaceans.

Uca sp. The fiddler crab gets its name from the male’s larger claw, which it waves up and down in a fiddling motion when threatened or when attracting a mate.

Anodonta subobicularis.

Aeolosoma sp. A small, freshwater Oligochaete, Aeolosoma is characterized by colorful oil droplets in its body. It’s easy to culture large quantities of this microscopic organism for use in regeneration experiments: Simply add hay and wheat grains to hay medium. Culture instructions are included. Size: 2–3 mm.