Lots and lots of tangs. There were few people early in the day. We must have exited at low tide, because the exit was not easy. Steep slippery rock stairs covered with urchins (I guess if you have shoes/gloves on you would be fine). The fish were gorgeous and visibility great even in January. You can rent Kayaks if you go through Captain Cook and enter the water and paddle to the right to get to the monument (it would be quite a long swim). We also saw a lot of spinner dolphins. All in all a great spot. We had no problem snorkeling for hours and never seeing the same area twice.