<p>To go with Guardian Travel's guide to underwater photography we'd like Guardian readers' to share their underwater pictures. Whether you've been lucky enough to swim in clear waters with a giant turtle and amongst multi coloured shoals of tropical fish or have managed to capture a great image in challenging and murkier conditions we'd like to see your photos.</p><p>We'd like to find out about your picture, so do let us know where and how it was taken. If you have any tips for taking good quality underwater photography, please share those too.</p><p>You can submit your images by clicking on the blue 'Contribute' button and we'll select your best photos for a gallery on the Guardian site.</p><p>GuardianWitness is the home of user-generated content on the Guardian. Contribute your video, pictures and stories, and browse news, reviews and creations submitted by others. Posts will be reviewed prior to publication on GuardianWitness, and the best pieces will feature on the Guardian site.</p><p><a href="http://www.theguardian.com/travel/2013/oct/14/underwater-photography-share-your-pictures">Keep reading...</a></p>