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Biology

The Mechanics and Sensory Control of Suction Feeding in Ray-Finned Fishes

Quick fact

Some suction-feeding fish can expand their mouth cavity by up to 50% of their body volume in less than 30 milliseconds, creating a water flow fast enough to overcome even the fastest escape responses of prey.

Why this is interesting

When a fish sucks in its dinner, it's not just opening its mouth—it's performing a lightning-fast hydraulic maneuver that would make a vacuum cleaner jealous. How does it avoid swallowing water instead of food?

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