I have a pet pirhana, and bubbles come out of his butt after eating my victims, can a fish really fart?

Answers:
happens to me all the time! of course!

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yep.why not ?.it's something natural.

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WTF? u got a pirahna! Thats tyte.

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its their victims expanding their last breath

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Fish develop gas in the gut, and this is expelled through the vent, much like that of most animals. The difference is in the packaging.

Fish package their excreta into a thin gelatinous tube before disposal. This includes any gas that has formed or been carried through digestion. The net result is a faecal tube that either sinks or floats, but as many fish practice coprophagia, these tubes tend not to hang around for too long.

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stick your nose in the water and see if it stinks like a fart, then you will know.muahaha

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Why not?