u/Impressive-Ask-1322

I have a 3 year old survival world recently I noticed that squids and dolphins are not spawning. Every other mob is spawning just fine but these two just won't spawn. I have tried lowering my render distance, I disabled all my chunk loaders I have flown 1000s of blocks away, and in my older copy of the world (it's a test world so I can't just keep playing on that one) they spawn just fine. Did anyone also have this issue and does anybody know how to fix this, thanks