Red Lionfish | Oceana
Home / Red Lionfish

Marine Life Encyclopedia

Ocean Fishes

Red Lionfish

Pterois Volitans

Distribution

ECOSYSTEM/HABITAT

Coral reefs

FEEDING HABITS

Ambush predator

TAXONOMY

Order Scorpaeniformes (scorpionfishes and relatives), Family Scorpaenidae (scorpionfishes)

The red lionfish is an ambush predator. It moves very slowly and often sits perfectly still, waiting for small fishes to approach too closely, at which point it lunges aggressively toward its prey. At the same time, it extends its jaws forward, creating a large amount of suction, and easily swallowing the prey whole. This species is not a picky eater and will eat just about any fish that it can swallow, limited only by the size of its mouth. As it grows larger, the size of the prey that it can attack and eat also grows larger. Some individuals have been observed slowly cornering prey with their large fins before attacking. In its natural geographic range, the red lionfish is eaten by large bony fishes and coastal sharks. In the western Atlantic, it has few (if any) natural predators. In both basins, it uses its venom-filled spines in an attempt to guard against predation (not to attack prey).

Male red lionfish are somewhat territorial and court females that enter the part of the reef that they defend. After successful courtship, a male-female pair reproduces by a behavior known as broadcast spawning. In this method, the female releases her eggs and the male releases his sperm in the water column, above the reef, at the same time. This behavior increases the likelihood that eggs will become fertilized and decreases the likelihood that fertilized eggs will be eaten by egg predators at the reef surface.

Red lionfish are eaten in some places but are not targeted heavily for human consumption. In the past, they have been captured alive, in large numbers, for display in public and private aquaria. They are naturally rare and have likely been depleted in some areas, but a more serious consequence of their live capture is the accidental establishment of large populations outside of their normal range. In the 1990s, one or several individuals were released by pet owners in Florida, USA, and over the course of the past twenty years, the red lionfish has become a very common, destructive invasion throughout the western Atlantic Ocean. Outside of its native range, there are few natural predators that can tolerate its venom. It also eats a wider variety of prey and lives in colder latitudes in the western Atlantic. It reaches densities up to ten times higher than in its natural range. On some Caribbean reefs, it is now the most common medium-sized predator. This invasion threatens coral reef food webs throughout the Caribbean Sea and other food webs in temperate areas. Though some eradication efforts are underway for the red lionfish, we have likely passed a point of no return with respect to this species’ invasion of the Atlantic Ocean. Scientists suspect that it will never be fully eliminated from that region and may, in fact, continue to increase its geographic range as a result of new invasions.

Engage Youth with Sailors for the Sea

Oceana joined forces with Sailors for the Sea, an ocean conservation organization dedicated to educating and engaging the world’s boating community. Sailors for the Sea developed the KELP (Kids Environmental Lesson Plans) program to create the next generation of ocean stewards. Click here or below to download hands-on marine science activities for kids.

Kids Environmental Lesson Plans

Additional Resources:

IUCN Red List

Get Involved

Donate Today

SUPPORT OUR WORK TO PROTECT THE OCEANS BY GIVING TODAY

With the support of more than 1 million activists like you, we have already protected nearly 4 million square miles of ocean.

Donate Now

TAKE ACTION NOW

Support policy change for the oceans

Decision-makers need to hear from ocean lovers like you. Make your voice heard!

Sign Now

VISIT OUR ADOPTION CENTER

SYMBOLICALLY ADOPT AN ANIMAL TODAY

Visit our online store to see all the ocean animals you can symbolically adopt, either for yourself or as a gift for someone else.

Shop Today

DOWNLOAD OCEAN ACTIVITIES

HELP KIDS DISCOVER OUR BLUE PLANET

Our free KELP (Kids Environmental Lesson Plans) empower children to learn about and protect our oceans!

Learn More

FEATURED CAMPAIGN

Save the Oceans, Feed the World

We are restoring the world’s wild fish populations to serve as a sustainable source of protein for people.

Learn More

More CAMPAIGNs

Protect Habitat

Bycatch

Plastics

View All

CONTACT

Oceana International Headquarters
1025 Connecticut Avenue, Suite 200
Washington, DC 20036 USA

General Inquiries
+1(202)-833-3900
info@oceana.org

Donation Inquiries
+1(202)-996-7174
wavemaker@oceana.org

Press Inquiries
+1(202)-833-3900
press@oceana.org

OCEANA'S EFFICIENCY

BECOME A WAVEMAKER

Sign up today to get weekly updates and action alerts from Oceana.

SHOW YOUR SUPPORT WITH A DONATION

We have already protected nearly 4 million square miles of ocean and innumerable sea life - but there is still more to be done.

Donate Now

QUICK LINKS: