There are oxygen systems out there that will do the trick. Be carefull though as I think these possesion limits are still in force...
http://www.matagordabay.com/hodgesaeration/
Hickory Shad / American Shad
American shad and hickory shad populations are currently listed as unknown, but a complete stock assessment is expected in 2007. American shad populations are believed to be suffering from depletion due to habitat loss and pollution.
• ME, NH: 2 fish any size
• MA, CT, RI: 6 fish any size (any combination of both species)