If you have completed a dive certification course you can experience the reef environment first hand. The best time to do these activities is during the warmer months. The dangers which can exist at Gray's Reef are things like strong currents at certain times or even some types of animals. Since Gray's Reef is in a temperate zone the water is colder in the winter and warmer in the summer. There are basically five types of sharks which can be found at Gray's Reef.
Corals belong to the same group of animals as anemones and sea jellies.
These animals use stinging tentacles to help capture and digest other living things. The most prominant hard coral at Gray's Reef is the Ivory Bush Coral. No, many differences exist between Gray's Reef hardbottom reefs and coral reefs. Gray's reefis a sandstone rock reef. Deposits of calcareous sandstone emerge from the sandy sea floor and provide a place for plants and animals to attach themselves.