Snorkel byron bays julian rocks marine reserve julian rocks is one of the few snorkel sites where you can swim with tropical species found on the great barrier reef as well animals from australias deep southern ocean here the reserve is home to three different species of sea turtle an assortment of rays including mantas hard and soft corals friendly wobbegong sharks and over four hundred different species of fish all of this is only a five minute boat ride from byron bay a snorkel trip