For aquarium photography I think it will be ok- not great and not horrible. Close-up performance will be so-so as well. It has a manual white balance setting which is good. I think of this class of cameras as "carry around in your shirt pocket" kind of camera for quick snapshots and if that's what you want it should be good. It has some good features for aquarium photography, like the manual white balance but the lens won't get you great close-ups and it's not very wide either (for grand landscape type shots for instance). I love the fact that it can do 4x3 or 3x2 or even 16x9 format pics- that's cool. Another negative (no pun intended...) I see from the looking at the specs-- no lens threads so you won't be able to use filters or close-up adapters easily. It comes with a rechargeable battery which is good, and it takes sd cards which I think is good too (cheap and available everywhere).
If you can find some samples from the camera- take a look at them full screen to see how the image quality is. Grainy is bad- and high iso pics can get really grainy. Pics taken at 200 iso should look good-- 400 is getting grainy on most cameras.
