Definition
Heliozoa are a group of freshwater actinopods, characterized by their spherical shape and radiating axopodia, resembling tiny suns. They capture food using their sticky axopodia. They are mostly found in clean freshwater environments. Some have silica or chitinous scales or spines. Heliozoans are an important part of the freshwater ecosystem. Their axopodia retract quickly when disturbed, making them fascinating to observe.