Photograghing anything moving is darn difficult, BUT I have found and easy way of doing so as long as there is no outside glare coming from behind you. Leave the tank light on and shut off any room lights and close any curtains in the room. Take a video for as long as you need to, getting various angles and sides (L.R.) of fishes/shrimps desired. A video camera is best for this purpose but the new I-phones will probably do o.k. Adjust setting (White balance/hue/color,etc.) so you the viewer can see well through viewfinder just as you would see the subject with the naked eye. Please BE IN-FOCUS as this is not a good selling point if you sell on-line! Take your recorded video and play it back on your puter. Then when you ifind a good shot or two slow it down set mode to frame-byframe. Select and save pics. Watch your sizing as well (pixel count H/V.) Happy videoing! :sunny: :sunny: