i know my evidence is a bit immature but heres why i think it...
-they are clearly close
-they were shown waking up together, clearly sharing a section or area with eachother
-in the pictures of sharks on the website everyone else is all seperate in the ones of them all by the rocks in the sea apart from those two who are cuddled together

more to it than what we see im sure!!!

yeah ive noticed all of the things you mentioned, i guess they could just be close friends but i think they will get together and would make a great couple!