April 22, 2011 -- Earth Day isn't just about life on land. It's also an opportunity to explore the organisms that inhabit the oceans.
The University of Miami's Rosenstiel of Marine and Atmospheric Science hosts an annual photo contest for the best snapshot of life under the sea. More than 600 images were submitted from an international pool of photographers.
This shot of two transparent gobies, taken in MarsaAlam, Egypt, claimed the top prize as the best overall photo of the competition.
Explore some of the other photos to claim top prizes in the 2011 underwater photography contest in this slide show.
PLANET GREEN: The Most Stunning Bodies of Water in the World
This pygmy seahorse, Hippocampus bargibanti, may be difficult to spot, given how well it blends into its environment and the fact that these seahorses don't grow any larger than an inch.
But this snapshot earned first prize in the contest's "Marco" category.
This vibrantly colored nudibranch (Cratena peregrina) was seen in Tarragona, Catalonia, Spain.
A nudibranch and a mantis shrimp rest on the sea floor of Bali's Seraya Beach in Indonesia.
Cuttlefish are seen mating off in the Oosterschelde estuary near the town of Zeeland, Netherlands. This photo took the top prize in the "Wide-Angle" category.
A stingray is surround by cardinal fish in this photo taken in Mogan in Gran Canaria, Spain.
A school of barracuda gathers in the Sudanese Red Sea.
This brightly colored jellyfish was spotted in Lake Worth Lagoon in Riviera Beach, Fla. The photo took the top prize in the "Fish or Marine Animal Portrait" category.
This web burrfish (Chilomycterus antillarum was spotted in the same location as the jellyfish in the previous slide. If it looks like it's smiling, that's because this photo took home second prize in the portrait category.
This frog catches its own reflection at the surface of a lake in Belgium just as the photographer snaps a picture.
This snapshot of an orange spotted filefish, Oxymonacanthus longirostris, claimed the top prize in the "Student" category. The fish was spotted in the water of YasawasIslands, Fiji.
This whale shark (Rhincodon typus) and its entourage were spotted cruising the depths of Ningaloo Reef, Western Australia.
If you look closely at this photo, you'll see a blue striped cleaner wrasse attending to the much more prominent Emperor Angelfish in in the foreground.