They play an important role in aquatic ecosystems as scavengers, cleaning up dead plants and animals for their food. And, in turn, providing food for many other animals. Crayfish in aquarium C rayfish are easy to catch. Look for them under rocks or logs in small streams or along the edge of rivers and even in shallow lakes. Get your boots on and head out to your local creek.
Minnow traps are another great way to catch crayfish.
Check the trap daily for whatever you may have caught. The best way to pick up a crayfish, for your and the crayfish's sake, is to grasp it firmly by the sides of the thorax, just where the chelipeds attach. Y ou can keep your crayfish in an aquarium or large jar. Be sure to keep the water well aerated, if you are planning to keep the crayfish more than a few days. This is more to keep the aquarium water clean and fresh-smelling, than to provide the crayfish with oxygen.