Dolphins in sunlight (Socorro, Mexico).
Jellyfish Lake (Palau, Micronesia). This photo of an old film photo isn't top qualify, but gives a good look at the softball-sized jellyfish that live in this land-locked lake high up on an island. These jellyfish have no sting, but instead "farm" algae on their tendrils.
Sea Pen with kelp above in the distance (Nootka Sound, British Columbia Canada). The green is not Photoshopped in for effect. The cold waters of B.C. really are green - due to algae.
