Welcome to the latest in a series of posts focusing on individual categories in this year's Travel Photographer of the Year awards. 

ONE SHOT: OCEANS, SEAS, RIVERS, LAKES

Over 70% of our planet is covered in water, from the great oceans to the smallest puddle. Water is the lifeline for life itself. It is a barrier and travel artery, a resource and a destructive force, an escape and a necessity. From a still, tranquil lake or a frozen pond to a raging tsunami; from gently flowing stream to fast flowing torrent; from flood to the essence of life which sustains people, nature and agriculture, water is fundamental to our existence.

This single-image category challenges you to show us your view of the earth’s most important resource; water. Your image can be about water in any of its many physical forms in nature and you can include the creatures that live in or on the water, and/or the people who make a living or take pleasure from our oceans, seas, rivers and lakes. You can enter B&W or colour images.

The winner of this category will have their own truly memorable water-based experience; a 'Northern Lights & Whale Expedition by Sailing Ship' in Northern Norway aboard a beautiful traditional two-mast schooner with WILDFOOT Travel.* They will also receive membership of Royal Photographic Society.

This category is open to all photographers. Entries close October 1st.

*Read our interview with WILDFOOT MD Simon Rowland here.