I found this at the NOAA website, and thought y'all might find it worthwhile. Check out the link to read more of what the recommendations are if you get "envenomated" or get one on your line.
NCCOS: Educational Materials: Lionfish
"Lionfish, now found in high numbers along the Atlantic coast, are relatively new invaders. Native to the Indo–Pacific, Lionfish are venomous predatory fish with few, if any, enemies. Their beauty makes them very popular in the aquarium trade, and introduction was likely due to release from private aquaria. Lionfish have venomous spines that can potentially harm humans if envenomated (stung)."