Definition
The Order Heliozoa encompasses a group of actinopod protists inhabiting freshwater environments. Characterized by their spherical shape and radiating axopodia, they resemble miniature suns. Axopodia, supported by microtubules, facilitate food capture. They engulf prey upon contact and retract rapidly when disturbed. Some possess scales or spines for protection. Their presence signifies good water quality and a balanced ecosystem.