Taking good pictures of my little fish is pretty tricky – they are fast wee buggers, always darting about and the guppies in particular head for the top of the tank when I go near (expected to get fed!). There is also not a lot of natural light around their tank. The only time I get even close is when there is food in there. When the feeding frenzy calms down, they do spend a reasonable amount of time all trying to eat the poor little cory’s catfish pellets!
Taken with my Olympus Pen EP-1. Setting: Aperture Priority. Aperture: f2.8; Shutter: 1/125; ISO: 800. Macro lens. Cropped in iPhoto.