Off the coast of Egypt, a diver is having an up-close and personal encounter with a Dugong. Unfortunately, a sighting like this is pretty rare due to the decreasing number of Dugongs around the world. The marine mammals are referred to as "sea cows" because of the way they graze the ocean floor, but it almost looks like they're cleaning the place up!
Speaking of rare, this clip shows bioluminescent algae in the waters of Jervis Bay, Australia. The natural phenomenon doesn't happen very often, and it makes the water look like it's glowing blue! What an unbelievable sight.