help to find name of old pc games

I am looking for 2 old computer games I used to play when I was younger arond 1995-1998. One was a game where u are a fish I remember rainbow trouts and u had to avoid bigger fish and hooks. The other game you had to go into a house and then under water and different places maybe to find keys to go to different places. I don't remember much about it but I really used to love it.

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