Sometimes we become so fascinated by what may live beyond the Earth that we forget how much lives is in our own back yard. In this series, Alexander Semenov explores the White Sea Biological Station, and  reminds us how much is left to be discovered in this world.

These are some breathtaking black and white underwater photos by Hengki Koentjoro. These photos give you just a small but incredibly interesting look at what life is like in the deep blue. It just goes to show what a large, interesting and amazing place the Earth can be.

You can also check out more photos on Flickr.