a distinctive coral so called for its black or dark brown skeleton. the windows provide you with the opportunity to watch all the fish swim by, the kids enjoyed the underwater observatory and while its not that big it did keep the kids entertained for a least an hour. once we had a good look around we headed back up to the top to get back on the boat. the kids were keen to spot either a seal, penguin, dolphin or whale which the captain of the boat said can sometimes be seen. unfortunately on this occasion none were to be seen, kept them busy looking though with a couple 