Lionfish Invasion: A Threat and an Opportunity for Divers
Learn why invasive lionfish are dangerous to Atlantic reefs and how divers are playing a key role in control efforts. Understand removal strategies, culinary use, and conservation impact.
PRESERVING OUR GREAT LAKES AND OCEANS
Lionfish Invasion: A Threat and an Opportunity for Divers
Why Lionfish Are a Problem
Native to the Indo-Pacific, lionfish were first detected off Florida in the mid-1980s and have since invaded the Caribbean, Gulf of Mexico, and Atlantic coast up to North Carolina. Because they reproduce quickly, have no natural predators in these waters, and eat a wide range of reef species, they dramatically reduce native fish populations and slow reef recovery. A single lionfish can lower recruitment of young reef fish by up to 79 percent.
How Divers Are Helping Control Them
Spearfishing & “Lionfish Derbies”
Divers in invaded regions participate in organized spearing events—sometimes called lionfish derbies—to remove large numbers from reefs. In one Jacksonville derby, two divers removed over 800 lionfish in a single day. These events can reduce local population densities by 70 percent across wide areas, though recolonization remains a challenge.
Creating a Market for Lionfish
Selling lionfish as sustainable seafood has created an incentive to remove them. Restaurants in regions like Florida and the Cayman Islands feature lionfish ceviche, tacos, and grilled dishes—offering divers additional motivation and helping local economies see the value in ongoing removals.
Some programs even process lionfish leather for crafts or jewelry, further supporting removal economically.
Research & Innovation
NOAA and other organizations are experimenting with lionfish-specific traps and technologies like underwater rovers to target deeper populations beyond recreational dive limits. Tagging and acoustic monitoring help understand movement and refine removal strategies.
What Divers Need to Know
Lionfish have venomous spines that can cause extremely painful stings, nausea, sweating, and even temporary paralysis. Use spearfishing tools and follow training protocols carefully.
Although dramatic, derbies and diving-based removal cannot eradicate lionfish entirely. Populations rebound quickly unless sustained efforts are maintained.
Informed consumption is key. While developing markets can support control, some experts worry about unintended consequences—like lionfish being intentionally planted to maintain supply. Always prioritize sustainable and transparent procurement.
What Divers Can Do
Volunteer in local removal efforts or dive tournaments—many dive shops coordinate monthly or quarterly spearing sessions.
Eat lionfish when responsibly sourced and advocate for restaurants or markets that support removal.
Support operators and organizations training divers in safe capture techniques, humane dispatch, and prevention.
Report any sightings of lionfish in new areas—citizen reporting helps early detection programs.
Educate fellow dive professionals on invasive threats and proper handling.
Happy and safe diving,
The ScubaBlast Team
NOAA Office of National Marine Sanctuaries. (2025). Impacts of invasive lionfish. Retrieved from https://www.fisheries.noaa.gov/southeast/ecosystems/impacts-invasive-lionfish
Divers Alert Network. (2016). Lionfish removal and control strategies. Retrieved from https://dan.org/alert-diver/article/lionfish-managing-the-invasion/
Smithsonian Magazine. (2023). How divers and chefs are fighting the lionfish invasion. Retrieved from https://www.smithsonianmag.com/science-nature/lionfish-invaded-army-divers-chefs-fighting-back-180968999/
Time. (2023). José Andrés wants you to eat more lionfish. Retrieved from https://www.foodandwine.com/jose-andres-lionfish-7152710
Axios. (2023, May). Underwater lionfish hunting events in Florida strengthen control efforts. Retrieved from https://www.axios.com/local/miami/2023/05/19/lionfish-hunters-wanted-florida
Reddit user insights. (2025). Diver experiences removing lionfish in Florida and Caribbean reefs. Retrieved from Reddit threads on spearfishing and lionfish impacts.