There are spoilers here about the diving-areas and the merfolk-storyline, I guess.
So, I have reached the mer-kingdom and am now allowed to visit the caves. So I thought, let's do that. I've been at it for a few rooms now and I cannot tell if I am going somewhere or if I am just farming trash - which I know more fun ways to do, like continue healing the ocean.
Is it worth it to keep going or am I just wasting my time in the caves rn? Am I overlooking something?