Sun corals (Tubastraea spp.) exhibit a natural feeding response to reduced water flow, extending their polyps during low-current periods. This behavior is not a Pavlovian reaction but reflects their preference for environments with minimal water movement, resembling their native habitats. If your sun corals open more during feeding when pumps are off, it suggests they thrive in low-flow conditions. Adjust their placement accordingly, creating an environment that mimics their natural setting and enhances their feeding behavior and overall health. Targeted feeding during low-flow periods can further support their nutritional needs.