We booked a snorkeling trip to Biscayne Bay expecting to go to the traditional Florida reefs (which we have dove or now snorkeled many times) on the Atlantic side of the keys. Because of weather the boat captain took us to the sheltered side to snorkel underneath the mangroves whose roots shelter from predators many fish nurseries. In the 2 1/2 to 3 feet of depth under the trees we saw thousands of baby fish of many different species along with many different colorful algae clumps clinging to the roots. It was a little weird at first poking my head under the trees and into the roots clumps but well worth it. Some previous snorkeling experience is recommended as one needs to float flat on the surface and keep the fins as far as possible from the bottom. If the tip of our fins even got within a foot of the bottom
It would stir up a cloud of sediment and decomposing organic material and we couldn’t see a thing. The swim over the grassy bottom to get to the mangroves revealed many different types of soft corals. This was truly a first time unique experience which I would like to repeat as we have visited many traditional coral reefs and shipwrecks over the years but never snorkeled under mangrove trees before!