It's great to see photographers push the limits of their talents and no less so than with underwater photography. There are a multitude of excellent shots at this years UPY which show some amazing work. I myself have never ventured further than taking underwater photos in the bath tub and found it difficult to get anything exciting. Check out more of the work by clicking on the link below.
Highly Commended: 'Unusually Parked Car' Pekka Tuuri (Finland)