A promising start...becomes ridiculous!

Rating: 3/10 (2 January 2019)

I gave this film a try based on the good rating it had on NowTv (mentions of Oscar awards etc) and the fairly good rating it had on IMDb.
It started off well - it has an arty feel about it, the set design is great, the characters are interesting, the acting was good and there was a good cast - what could go wrong?
About a third of the way through, it started to go downhill fast. The storyline could have been so promising, but for whatever reason, it got taken down a very strange path and I have no idea why!?
I found myself wondering if the actors themselves were embarrassed at how ridiculous the storyline became, having to act out scenes which were just so odd - a fish man being able to do sign language straight off the bat, or the fact they have sex together. Or even that they would fill the bathroom with water with no thought to the consequences? Just so many silly scenes which drove me to fast forward the last 3rd of the film.
Such a shame because it really did have potential. I would say don't waste your time - I wish I hadn't.