Noun: daphnia daf-nee-u
- Minute freshwater crustacean having a round body enclosed in a transparent shell; moves about like a flea by means of hairy branched antennae
"Daphnia are commonly used in aquarium fish food";
- water flea
Derived forms: daphnias
Type of: branchiopod, branchiopod crustacean, branchiopodan
Part of: genus Daphnia
Encyclopedia: Daphnia