From their bold stripes to their sharp spines, lionfish are one of the flashiest fish in the sea! Their dramatic coloring makes them very popular in the aquarium industry (and understandably so, they’re spectacular to look at). But be sure to just look, and don’t touch: Lionfish spines contain a nasty neurotoxin that causes pain and swelling if injected. They use their spines as a defense mechanism from predators.

Lionfish are considered quite a nuisance in some parts of the world. Although originally from the Indo-Pacific region, lionfish were released in the Atlantic through the aquarium trade. They are generalists, meaning they aren’t picky when it comes to their food, and made themselves at home in this new region. Now, you can find them through the Western Atlantic, Caribbean and Gulf of Mexico. They are designated an invasive species, meaning they are not native to the region and cause harm to the local ecosystem.