How many are in there, and how many different types? I know some are smaller because they're younger, but is there much of a size difference between the different types? How big can they get, and how big are the ones you have?
Are you willing to grab an empty tank and photograph them from the side? They look good from the top, but I'd really like to see the different types from other angles.
Do you have any pics of the whole pond? Do you have anything in there other than the various Mahseers?