11. Celah Celah
This a deep wall with large cuts gouged out of the reef, cracks and crevasses everywhere and normally excellent visibility. It's great to look out from these and have the sunlight bursting in, lighting up the blue, which makes this a popular site with photographers. Hippocampus Pontoh can be found here (a newly-discovered species of pygmy seahorse!) and black tip or white tip sharks cruise just below you. The many sea squirts and algae on the wall here are great places in which to discover small, strange creatures hiding.