noun (plural same)
A tiny and semitransparent freshwater crustacean with long antennae and prominent eyes, often used as food for aquarium fish. Also called water flea.
- Genus Daphnia, order Cladocera.
- In addition to fish, other aquatic creatures such as clams and daphnia are used as indicators of chemical changes.
- Fish are feeding on small light olive buzzers and daphnia.
- When they reach a length of 12 mm, chub begin to feed more on small invertebrates, particularly chironomid larvae and tiny crustaceans, such as daphnia.
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