Help REEF fight invasive lionfish species by scuba diving, hunting and fishing in the Caribbean, Atlantic and Gulf of Mexico.

Facts about invasive lionfish in the Caribbean and Atlantic: Learn about their habits, why they are bad and dangerous, and even a few tasty ways to kill them.

Interview with National Geographic Photographer Brian Skerry on saving the ocean and what it feels like to be honored as a Sea Hero.

Spearfishing isn't just a sport, but also a way of life for spear fisherman like Antonio Negron who catches just enough to survive and eat.

Watch underwater photographer Thomas Peschak on TED Talks as he discusses his work and marine conservation.

Want to see sea turtles while scuba diving or snorkeling? Go to Florida, Cayman Islands and Australia! See underwater photos of these amazing animals.

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Video shows hundreds of manatees flocking to Three Sisters Springs in Crystal River Florida — it's a beautiful sight!