I discovered something very important a little too late

"Freygea;c-17130624" wrote:
It may have already been posted. The large red and white buoy in upper left map area - mermaids can survey the ocean floor. Mine is a marine biologist and was able to.

Hmm I didn't get a survey option from the deep dive buoy. There was a free dive and then the other dive options. I will check the one you mnetioned, the one I tried was the one off of the volcano island.