Long a concern for researchers and scientists, the lionfish is an invasive species in the Atlantic, and efforts to control the population have not been successful according to the Christian Science Monitor.

“There is strong evidence that the lionfish is having negative effects on the native population,” Oregon State scientist Stephanie Green told CSM. “We don’t see any signal that anything is controlling lionfish population.”

The problem is that the lionfish, which is native to the western Pacific, has no natural predators in the Atlantic Ocean. They live up to 15 years, and one female can produce as many as 2 million eggs in one year. That adds up to a whole lot of hungry lionfish. Estimates have the Atlantic population increasing 700 percent from 2004-08 alone.

Growing up to 18 inches long, lionfish are skilled hunters known to eat just about anything they can fit in their mouths. CSM estimates that about 70 percent of the Atlantic’s fish species is on the lionfish’s menu and that at least 40 native species have suffered thanks to the lionfish. They are especially threatening to native coral and have been found with fatty livers from gorging so much on Atlantic Ocean natives.