This one hour program was broadcast on PBS last night. While its primary focus is on Lion Fish, which are not native to the Atlantic and Gulf of Mexico, it also touches on a few other species, like the Murder Hornet now in the NW USA. When an invasive species pops up, without natural predators, it becomes a whole new game of survival.
Lion Fish are native to the Western Pacific countries, it is not a problem there because over the millions (or billions) of years an equilibrium of sorts has been established, they have predators, and the relative populations are relatively stable. Small Lion Fish are very attractive, they have been popular in salt water aquariums. However when they get dumped and grow in open waters, they have a couple of characteristics than make them dangerous. They are voracious eaters and digest their food very quickly so they begin quickly to decimate certain marine species. Plus they reproduce rapidly and in great numbers.
Fortunately for ecologists, the Lion Fish have another characteristic, they like to hang out near structures, and they move rather deliberately and don't seem particularly afraid of humans, so a diver with a spear can gather dozens of them rather quickly. And this has become one of the primary ways to control their population, paying divers to gather adult Lion Fish. Plus they apparently are very tasty when cooked.
This is a very good PBS program, not only does it educate about this particular species, it also give a good glimpse into how conservationists approach invasive species and use inventive methods to solve the problems.