I saw the symmetrical brain coral “Diploria strigosa” for the first time here on the Turtle beach
Prevent snorkel mask fogging. Clean your mask often, and then don't touch it inside. Clean it with toothpaste, and a toothbrush, not your finger. Apply a small amount of non-abrasive toothpaste, and scrub it in hot water. Rinse it completely in hot water. Do this often.