The world beneath the sea at Turkoise is unbelievable. Tons and tons of fish of every conceivable size and color. It is silent except for the fish munching coral. A distinctive chewing sound. This is difficult to do.
Sand dollars are white, they blend in with the sand are therefore hard to see.
I wore a mask for this, no snorkel. Sand dollars are very fragile. If you get too excited about finding one and grasp it too tightly, it breaks. I broke all mine. I went snorkeling 2 other times this week, both Club Med trips, so they were free but you had to buddy up.