Lovely picture, but the middle takes a bit of guessing. It did for me, anyway - not sure if I did something wrong, but I got there in the end! Worth the effort :)

A bti of guessing needed indeed. Perhaps it helps if you know that it is a fish swimming to the left. :)

What's with all the dead fish puzzles today?
My office is starting to stink! :)

Ui, this was hard stuff. But finally I made it. :-)

Multiple possible solutions. Thank you for the puzzle!