daphnia
Tiny aquarium food
Daphnia are tiny freshwater crustaceans, often called water fleas for their jerky swimming motion.
They're a staple food for aquarium fish and a standard organism in biology labs for studying heartbeat, toxicity, and environmental stress—their transparent bodies make internal processes visible under a microscope.
Non-saline aquatic environment
- pondSmall still body
- zooplanktonDrifting aquatic microorganisms
- grazerHerbivore eating low vegetation
- predationHunting and consuming prey
phytoplankton · detritus · lake · wetland · littoral · pelagic · eutrophication
Minuscule aquatic crustacean
- carapaceProtective dorsal exoskeleton
- exoskeletonExternal skeletal structure
- moltShed outer covering
- chitinArthropod shell polymer
antennae · parthenogenesis · instar · swimming · hopping · transparent · hemoglobin
Source of input
- cultureCollective social practices
- breedingReproductive cultivation of organisms
- aquacultureFarming underwater organisms
- fryCook in hot fat
nutrition · harvest · colony · tank · population · reproduction
Test using living tissue
- toxicologyScience of poisons
- pollutionEnvironmental harm from waste
- sensitivityResponsiveness to stimuli
- laboratoryFacility for scientific investigation
freshwater
Non-saline aquatic environment
- pondSmall still body
- zooplanktonDrifting aquatic microorganisms
- grazerHerbivore eating low vegetation
predation · phytoplankton · detritus · lake · wetland · littoral · pelagic · eutrophication
waterflea
Minuscule aquatic crustacean
- carapaceProtective dorsal exoskeleton
- exoskeletonExternal skeletal structure
- moltShed outer covering
chitin · antennae · parthenogenesis · instar · swimming · hopping · transparent · hemoglobin
feeder
Source of input
- cultureCollective social practices
- breedingReproductive cultivation of organisms
- aquacultureFarming underwater organisms
fry · nutrition · harvest · colony · tank · population · reproduction
bioassay
Test using living tissue
- toxicologyScience of poisons
- pollutionEnvironmental harm from waste
- sensitivityResponsiveness to stimuli