Hi Christian,
it is great to see that you are working with a film camera, and an Olympus OM1 no less. A couple of my teachers at high school had these cameras and I used to think they were so special – the camera that is!
I think your overall approach to this photograph is fine, but the one thing I question is why you chose to turn the picture into a panorama. Have a good look to the left and the right of the picture, and ask yourself if anything there is really contributing to the photograph. I would say no.
All I would do to this photograph is to crop the left and right sides tighter, remove the white spot from the lower left of the picture and I think you will be in business.
My only other consideration is that it would have been nice to have seen some of the squid's tentacles… just to add a little squirm factor to the photograph. Otherwise, all good!
Cheers,
Anthony