At some point in their lives for one reason or another every single fish will jump out of the water. Everything. Except butterfly fish 😂😑. Jk they of course will. Fish jump for many reasons. Getting scared, chasing flies, chasing each other, playing, fighting a current, being curious, anything can happen. I've seen a pleco jump, I've seen cats jump, hell I've even seen snails jump. No not snails but I have seen snails climb out of one tank and into another sitting next to it. No joke. But I'm sure you get the point by now anyways.