Uh, it's always been my understanding that all big fish like that are plastic because 1) the fish's skin won't preserve outside of water and 2) those fish are catch and release. You catch it, take its measurements, tag it and let it go. You give the taxidermist the measurements and he makes the mount from that. It's illegal to catch and keep them. At least, that's what happened with my sailfish.
The defendant probably bought it at a garage sale and decided to sell it.
It's really sad that FauxRaven doesn't own a mirror or have a good enough friend to tell her, "hey, you look really stupid like that."