Thanks for the interest in the photos here at LittleFishtank.com. There are photos here from many sources and some of them belong to me and others belong to the users of LittleFishTank. Users who submit photos to LittleFishTank give permission to LittleFishTank to use them for promotion of LittleFishTank.com but the user still retains ownership of the photo and would need to be contacted for permission. Additionally there are also photos that came from the NOAA a US Government Agency. These photos are usable here and can be identified with the Courtesy of NOAA credit. These we cannot give permission for commercial use.

Overall the main answer is you will need to tell us exactly which photo(s) you wish to use so I can reply photo by photo to either put you in contact with the owner, or quote you on what is needed for use. Depending on your project there may or may not be fees involved. Thanks!