Daphnia, small planktonic crustaceans sometimes called "water bugs," are at the base of many fresh water food webs and are commonly consumed by small fish. They are also eaten by many aquarium fish and pet fish. More »

According to John Clare, starter cultures of Daphnia can be mail-ordered from LFS Cultures, Blue Spruce Biological Supply and LarvaTech. Daphnia can also be captured from most lakes or ponds using a fine-mesh net. Purcha... More »

www.reference.com Pets & Animals Marine Life

Newts eat small fish, worms, grubs and other larva. Pet newts also eat commercial newt and salamander food. Newts require a varied diet to stay healthy. More »

Freshwater eels eat small fish, worms, and crustaceans. Most eels are carnivores or meat eaters. They may also eat frozen fish food. More »

According to John Clare, starter cultures of Daphnia can be mail-ordered from LFS Cultures, Blue Spruce Biological Supply and LarvaTech. Daphnia can also be captured from most lakes or ponds using a fine-mesh net. Purcha... More »

www.reference.com Pets & Animals Marine Life

Cnidarians obtain food, mostly prey animals such as crustaceans and fish, by passively waiting for animals to pass by and touch their tentacles, whereupon they poison them and draw them toward their mouths to be digested... More »

Crawdads, or crayfish, feed on small fish that can be captured with their claws, other invertebrates and plants, both living and dead. Those are that are kept in freshwater aquariums will eat regular and tropical fish fo... More »