I had never heard of a fish arcade until you just mentioned it, but after Googling, I can safely say that this looks like the type of game I'd like to play.
Am I right in assuming the below video is the type of game you refer to?
https://www.youtube.com/watch?v=_nWvNyKwEG0The only issue I can imagine is that it looks like quite a resource intensive game, so I imagine it would have quite a high house edge, since each play session is quite long.
Are there any similar games available for crypto casinos?
Yes this is 1 of many games, hopefully a site make a online game like this that we could deposit bitcoin and change in to tokens or something similar