Sony Mavica is a real nice camera I have been using. It has its own mini-disc so there is quite a bit of storage on the camera itself. There are several models with various megapixel ratings. Ours was US$1500 new, but now they are down to $650-700 range. It is fully automatic or fully controllable like a manual camera, whichever you like. I have to say, I am a novice at photographing the aquarium though, and I still get lots of blurry fish as well, definitely a shutter speed/focus type issue.