1. Plural of daphnia; small freshwater crustaceans of the genus Daphnia, commonly used as food for aquarium fish and in scientific research.
Usage: Usually used in plural form; Also called water fleas; Common in biology and aquaculture contexts

Examples

• The aquarium store sells live daphnias as food for tropical fish.
• Daphnias are frequently used in laboratory studies of genetics and evolution.
• Many fish breeders culture daphnias in tanks to provide nutritious live food.
• Under the microscope, daphnias display fascinating reproductive behaviors.
• The pond contained thousands of daphnias during the spring bloom.