explore the ocean quest

[jaunty flume]

So I have cleared 15 corals but I can’t get any more space to open up to finish quest. I googled and it says that I’m supposed to give the turtles something but they don’t stay in one place and they don’t have a bubble that shows what they want. The paths are blocked by black stuff. What am I supposed to do?

[broken bolt]

turtles long gone from progression (they used to be a blocker to areas), id bet youre missing the sites up north in 10m jellyfish area