Ok what would happen if a fish was in space inside of a spaceship?

Question

but here is the problem. the fish would be inside of a plastic bag, which is filled with water. then you pop the plastic bag and the water should stay in the shape of the bag with fish inside the center of what now is a bubble of water just floating in the air. what would eventually happen i wondeR?

Answer 1

I think the fish would adapt very quickly. Fish are already accustomed to a kind of weightlessness. If you didn't have the water in a container, though, it would get sucked into a vent somewhere, and that would be it for Mr. Fishy.

Answer 2

First, it would get disoriented, as it's organs are adapted to Earth's gravity; some fish have the same balance system as humans, using fluid movement in their ears to provide a sense of balance. And, of course, it's swim blatter would just be useless, as it counters gravity through buoyancy - but there's no buoyancy where there's no gravity.

So probably our little fish friend would be very nervous in this situation, which would lead, if you think about how fish react when you take them out of their environment, to it splashing and squirting; doing so would break the water tension, rupturing the buble into several smaller bubble, with our fish floating mid-air with no water to breathe in.

In real space missions, fish are kept in closed water containers, so their water don't spill out. In those situations, fish have time to adapt, and they swim in loops.

Look at this pretty picture:

http://lh6.ggpht.com/_28k-qlba82I/R4AfAs...

These are actual fish, in actual space, in actual water. But in a closed tank.