1. 1MX60cmX60cm fish tank can raise arowana?

Width 60 is enough, but length 1. 1 is not enough. You can raise silver dragons, especially small silver dragons. It's hard to say when you're old.

Silver dragon is a kind of fish with no special features, and there are not many people raising it now. It is better to raise golden dragons.

It's not bad to raise Lei Long fish in this jar. For example, a pair of golden cobras, Lei Long, are not as domineering as the Silver Dragon, but more playable.