On the subject of arowana lifespan, this just popped up on our local ebay-equivalent;
http://www.trademe.co.nz/a.aspx?id=655371940
Not the prettiest fish, I'd say it was kept in too small a tank for far too long (I remember this shipment coming in, first time I'd seen asian aros, and the LFS really struggled to move the last of them), but it is coming up for 12 years old and still seems to be going strong. I guess that is the beauty of Asian aros, you should be able to tell the exact age based on the cert.
http://www.trademe.co.nz/a.aspx?id=655371940
Not the prettiest fish, I'd say it was kept in too small a tank for far too long (I remember this shipment coming in, first time I'd seen asian aros, and the LFS really struggled to move the last of them), but it is coming up for 12 years old and still seems to be going strong. I guess that is the beauty of Asian aros, you should be able to tell the exact age based on the cert.