I created the bones by going to systems>bones and making 4-5 bones through the middle of the fish that I modeled. I skinned it, animated it and it all went fine, then I imported and merged it in to my other max file that contained my scene. This is when my fishes skin stretched far in to the distance, and I had to reapply the skin modifier, and I had to rebone the fish, as the bones were not moving.
After reboning the fish, I tried it out and now the bones don't move properly. Instead, they kind of jerk around weirdly, and rotate, even though I am simply using the movement tool. When I move the bones to their outer most bound they become more fluent, and when I straight them up again they become jerky and unpredictable.
I'm sorry if I didn't explain myself well or if I missed out important info, I'm completely new at this. Any help is appreciated!
Thanks in advance