No problem, Leila! The you can access the support request by clicking
here. That will let you submit your problem directly to the developers!
The cave message always comes up when a villager enters the cave because that's what they see when they go in there! Just like real life!!

That way, anytime you want to check out the message again, you can stick a villager in the cave. If you're tired of it - just tell your villagers to stay out of the cave!

And, yes, fishing improves the farming skill of your villagers, which is a good thing (master farmers are better at fishing than other farmers)!
