One team is diving the cool beautiful waters around the Gulen Dive Resort in Norway, whilst the other team is exploring the pretty tropical waters of the Lembeh Resort in Indonesia.

The Shootout adheres to the highest possible ethical standards. The Rules state that participants and guides may not touch subjects, and that behaviours, positions or subjects in locations that do not occur naturally, will result in the images being disqualified.

The latest challenge has been to shoot 'Critters', aka fish and invertebrates. There are 25 stunning images for you to view before you cast your ONE vote.

You can only vote for this today, and voting closes at 9pm BST tonight.