evolution

I was looking through my photos and found a lot of old pictures of my little 23 gallon tank. Ive made a lot of changes and just wanted to show you how it has changed over time! When I first got it, it was for my annoying, very shy texas cichlid:

This is a great article that explains the evolutionary path of the Asian arowana. It's a little heady but has some interesting insight and information. http://www.biology.ualberta.ca/courses.hp/biol606/papers/Kumazawa+00.pdf