Pneumatic potato guns like this one use compressed air and are legal as long as they are not used like a weapon (e.g. shot at a person, etc.), so this line launching device would be legal under state and federal laws. However, you should check for local city and county ordinances because some local governments prohibit use of any devices that propel projectiles, and if you intend to use this line launching device on any state beach, you may also want to consult state parks.
As far as using it to cast a fishing line, nothing in the Fish and Game Code or its implementing regulations prohibit using this compressed air launcher as long as the fishing line is attached to a rod and reel, or a person is brave enough to hold the other end of the line in their hands!
A couple of us have caught over 200 since February in one little cove while fishing for carp. We were told by park personnel to kill them (seemed reasonable) but I wanted to make sure they are inedible so that we won’t get into trouble for wasting fish. Please advise. Thanks. – Bill S.
Here’s something that might surprise you … Plecostomus are consumed by humans in some of their native Central and South American waters. Jackson Landers, author of “Eating Aliens: One Man’s Adventures Hunting Invasive Animal Species” includes a recipe for Plecostomus in this book.