"Ward's Phenomena"

These unique salamanders keep their gills and stay fully aquatic even into adulthood, making them ideal subjects for embryological and developmental studies.

These industrious scavenger insects devour organic matter — the larvae will even clean a skeleton of muscle, skin and cartilage.

Use this representative collection to introduce your students to a variety of simple living organisms.

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

Hydra are tiny animals closely related to jellyfish. They are a carnivorous species that can be found in healthy freshwater rivers and streams where they attach themselves to plants and rocks.

Daphnia are a widely studied small crustacean used for a number of physiology studies including the effects of drugs on heartbeat and temperature on metabolism.

Hydra are tiny animals closely related to jellyfish. They can be carnivorous as well as photosyntheic due to their symbiotic relationship with green algae Zoochlorellae.

Cockroaches are widely used in labs for physiological, behavioral, structural, and developmental studies.

These small aquatic amphibians breed readily in a freshwater tropical aquarium.

Ideal for use as a model system, this free-living nematode has biological processes similar to those of other animals. The transparent animal normally inhabits soil.