"No person shall have live fish in their possession when leaving the freshwaters of the state, except those species allowed to be possessed and used as live fish for bait or the person is participating in a permitted fishing tournament."
The defined list of baitfish species from page 14-15 is:
- rainbow smelt (Osmerus mordax)
- longnose dace (Rhinichthys cataractae)
- blacknose dace (Rhinichthys atratulus)
- northern redbelly dace (Phoxinus eos)
- lake chub (Couesius plumbeus)
- creek chub (Semotiliusatromaculatus)
- fallfish (Semotilius corporalis)
- golden shiner (Notemigonus crysoleucas)
- common shiner (Luxilus cornutus)
- emerald shiner (Notropis atherinoides)
- bridle shiner (Notropisbifrenatus)
- spottail shiner (Notropis hudsonius)
- silvery minnow Hybognathus nuchalis)
- creek chubsucker (Erimyzon oblongus)
- longnose sucker (Catostomus catostomus)
- white sucker (Catostomus commersoni)
- killifish/tomcod (Fundulus sp.)
If I'm gonna follow NH state law, my aquarium will be limited to "bait", lol.
Edit 3/6: To clarify, I'm talking about filling an aquarium by collecting your own.