Don't Fuck With Nature

Oh look, My pretty Lionfish has gotten too big for his expensive Aquarium! Like all good Aquarium Keepers I'll let my fish continue to live by letting him go into the middle of the Caribbean, and he'll fit right in in this new environment and become perfectly good friends with all the nice Native Fish!"

Nice going dumbass, you just introduced an Invasive Species into an Environment where it doesn't belong. Now the Caribbean Ecosystem is fucked 'cause your pretty little pet is a dangerous, voracious predator with few to no natural predators in his new environment and they're just going to keep gorging themselves until every last fish in the Caribbean, them included, has keeled over dead.

Give yourself a pat on the back, chucklefuck.