Minute free-swimming freshwater copepod having a large median eye and pear-shaped body and long antennae used in swimming; important in some food chains and as intermediate hosts of parasitic worms that affect man e.g. Guinea worms.

synoniem: cyclops.

Nederlands: waterluis, watervlo
Pools: oczlik

Minute freshwater crustacean having a round body enclosed in a transparent shell; moves about like a flea by means of hairy branched antennae.

synoniem: daphnia.

Nederlands: watervlooien, waterluis, watervlo
Pools: rozwielitka, dafnia