Pterois volitans, Pterois miles
Lionfish are ornamental reef fish native to the Indo-Pacific Ocean. Reaching 12–15 inches in length, they feature long, feathery-looking fin rays and a dramatic reddish-brown and white banding pattern. The fin rays are spiny and venomous; this feature, along with their aggressive nature, make lionfish challenging pets. Nonetheless, lionfish are very popular in the aquarium trade and frequently imported to the U.S. Unfortunately, they have been introduced to coastal Atlantic waters and the Caribbean where they are causing significant damage to tropical and sub-tropical reef ecosystems.