Even if you're diving in an environment where corals or kelp do not flourish, you're likely to have an exciting dive anywhere there are rocky reefs. Rocks are often covered by colorful sponges, anemones, and other invertebrates. Don't overlook the small cracks and crevices, which are common homes to octopus, eels, lobsters, and other fascinating creatures.

The waters above rocks are home to a variety of fishes that feed on the smaller inhabitants of the reef, so be sure to observe the area above you. And don't forget the patches of sand nearby, where interesting sand dwellers hide from their predators.