Smile for the camera! This snap of two gobies - a type of fish - won the top prize at an underwater photography competition.
Here are some of the other winning pics. Look carefully to find a pink pygmy sea horse. These sea horses are tiny - usually no more than 2.5cm!
This web burrfish doesn't look shy of the camera!
Looking at the camera here is a nudibranch - also known as a sea slug - and it was snapped in Spain.
This frog is close to the surface of a lake, so its reflection looks pretty cool.
This stripey fella is an emperor angelfish and was snapped in Fiji - an island nation in the Pacific Ocean, near to New Zealand and Australia.
Whale sharks like the one in this pic are the largest fish in the world - but should not be confused with blue whales, which are mammals, and are the largest animals in the world.
There are lots of types of jellyfish and they can be found in every ocean in the world.
This is an orange spotted filefish. Filefish are so named because they have skin a bit like sandpaper or a nail file.