👉 The term "Acanthoaxiidae" describes a group of small, aquatic animals that primarily inhabit freshwater environments and feed on algae. These animals are known for their hard exoskeletons made from calcium carbonate and have a unique, streamlined body shape. Their diet consists mainly of algae, which they absorb through their trachea-like mouth, and small invertebrates, such as planktonic crustaceans.