Mystery #2Tier 2biology / fish / floating
How does a fish hang perfectly still in the water without sinking or rising?
Watch a fish in a tank and it can hover in one spot, not drifting to the bottom, not bobbing to the top, as if it is frozen in the middle of the water. If you stopped moving in a pool you would slowly sink. Yet the fish just hangs there, barely twitching a fin. So how does a fish hang perfectly still in the water without sinking or rising?
Your guess
What is your hunch about how a fish holds its place in the water?
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