Chaoborus punctipennis

Chaoborus punctipennis is a species of phantom midges.
Survival Patterns: Chaoborus punctipennis tend to move vertically through the levels of the water to avoid predation by fish. “an oxygen concentration below 2.0 mg/l could not be tolerated by fish. Comparison of the depths at which this critical oxygen concentration occurred with mean larval depth showed a significant correlation, supporting the hypothesis that diel vertical migration affords protection from fish predation”.