If we knew where you were from it would help. A few general rules to live by though. This is only from my limited scorpian experience.

1. The clearer the scorpian, the more venomous.
2. The smaller the scorpian, the more venomous.

We kept em in big jars when I was stationed in Arizona and, fed them any bugs we could find. Probably not the best hobby, but it kept us bored airmen entertained.