Specifying the direction of rotation animations

Hi! :smiley:

I’m trying to animate a fish model with LocRot keyframes. I want it to loop so I made the first and last keyframes have identical Loc and Rot values. Near the last keyframe however, the fish rotates the other (longer) way around to the position I specified. I’ve tried adding another keyframe closer to the last one with Rot values closer to the latter but it still goes the long way.

is there a way i could specify the way i want the fish to rotate?
(i’m a newbie, btw! :D)

No blend file included in your post for review

Look in the graph editor window to adjust change in rotation