Fish use more energy to stay still than previously thought
Phys.org
February 21, 2026
AI-Generated Deep Dive Summary
Fish hovering motion, which lets them remain stationary underwater, is more energy-intensive than previously thought. Contradicting the common perception of this behavior as effortless, researchers found that maintaining position requires significant muscular effort, challenging previous assumptions about fish energetics.
The study highlights how fish sustain their balance through active muscle contractions and fin movements, even while appearing motionless. This finding contradicts earlier models that underestimated the energy expenditure involved in stationary swimming.
Fish employ a mix of behaviors to minimize energy costs during hovering. Some species rely on strategic positioning relative to water currents or structures, reducing the need for constant effort. Others exhibit unique adaptations like specialized fin shapes or streamlined body designs that enhance efficiency.
These insights challenge traditional views of fish energetics and open new avenues for understanding their survival strategies. The findings also have implications for broader scientific fields, including comparative physiology and evolutionary biology.
This research underscores the complexity of even seemingly simple animal behaviors and their significance in ecological balance. Improved understanding of fish energetics could aid in conservation efforts and enhance aquaculture practices, where energy efficiency is crucial for sustainable fish farming.
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Originally published on Phys.org on 2/21/2026