Thanks for the advice. A nano reef would be awesome, with the local crabs/etc. that I know to be in the area. I will look into what's legal/not,definately. I am going to be Googling Nano reefs all day now;thank you!

I should have realized it about the sharks. I think that I was thinking of the redtail sharks,that stay relatively small.. not sure how they'd fare with a puffer though.I had a FW puffer years ago, in his own tank; he did well, and I ended up selling him in a financial pinch