Oooh…. What does this button do?

Ooh ooh… I saw a ray today… a huge ray, it was about as long as I am, and it was right on shore… the water must have been 30 cm deep, and it just glided along the floor… I followed it around for about 5 min, but then it was too fast for me and I lost it. I also saw the coolest little fish. At first I thought it was a piece of algae… but when I looked closer I noticed it was a little green fish with algae-like appendages sticking out everywhere and red dots on the end of them… like a mini monster from the deep.