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LostInParadise's avatar

Could a squirt gun be built to shoot like an archer fish (see details)?

Asked by LostInParadise (31905points) February 4th, 2018

Years ago I saw a small interactive exhibit at the San Diego zoo. It contained an archer fish. If you pushed a button, an object that looked vaguely like an insect hovered over the water and the archer fish squirted water at it. That image has stayed with me, and today I did a google search to learn more.

The fish really are amazing. It is not just that they can accurately target an insect up to six feet away. The really extraordinary thing is that they accelerate the stream as they emit it so that the end of the stream eventually catches up to the front just as the target is reached. The result is that the insect is walloped by a large drop of water. This gives an explanation.

Could a squirt gun be built with an adjustable mechanism to accelerate the stream the way that an archer fish does? I can’t think of any use for it, other than to show what an archer fish does, but if it could be used safely, it might make for a fun toy.

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