Biggs, I get your point . . .
but the difference between sharks and lionfish is that sharks evolved naturally as part of the Caribean ecosphere, that is not the case with lionfish and the lionfish are negatively impacting the health of Caribean reefs, which essentially means the entire Caribean ecosystem.

I'd probably soil my swimsuit if I saw a shark (other than a nurse shark) while I was swimming but I wouldn't advocate their wholesale slaughter.
Lionfish on the other hand should be eradicated from the entire Atlantic, because they're an invasive species.