Montana
NO PERMIT REQUIRED for closed recirculating systems or fish tanks.

Montana- list of prohibited species:
http://fwp.mt.gov/wildthings/exotics/prohibited.html

87-3-210. Permit required for importation of nonsalmonid fish or eggs
http://data.opi.mt.gov/bills/mca/87/3/87-3-210.htm

87-5-706. Noncontrolled exotic wildlife authorized for possession or sale http://data.opi.mt.gov/bills/mca/87/5/87-5-706.htm