They're in the water – pond water, that is! Infusoria is a term used to describe aquatic creatures – small invertebrates, unicellular algae, protozoa, etc. – that live in freshwater ponds. To the naked eye, they can appear as little specks moving through the water. Here's a pro-tip: aquarium owners can use infusoria to feed fish fry (newly hatch fish).🤢 #science #aquarium | Science Channel