By Tobias Carroll When you look at photos or videos of the lionfish, you might find yourself struck by its unique appearance and the graceful way it moves through the water. Unfortunately, those aren’t the only notable things about this species; in the 21st century, it has developed a reputation as an invasive species. The U.S. Department of Agriculture pointed out that the lionfish is a threat to local species on two fronts: its penchant for eating them and the presence of poison in its spines, all of which makes this species a threat to marine populations around the world. That, in turn, has…