I've posted about the non-native Lionfish Caribbean invasion before (here and here) and it is looking pretty dire for small and juvenile fish there that are no match for the formidable Lionfish in some areas. However, a recent picture taken by a recreational diver has scientists really excited as it supports their theory of one local fish that could help. The Grouper. If you look close, you will see a Lionfish head sticking out of the Grouper's mouth in this photo. This should be no big surprise for those of us that have had Groupers in aquariums before. They are eating machines. Chalk one up for the Grouper. Many more to go. Grouper Swallowing Lionfish in Nassau - Credit: Lyle Gremillion Background on photo: The dive was in 35 to 40 feet of water at the site Cave Reef near Nassau, Bahamas. Lyle estimated the Nassau grouper as 3 feet in length. It was a night dive and the photo was taken about 8:15 p.m. Lyle commented that there seemed to be plenty of grouper in the area. There were also plenty of lionfish (20) on this particular site. Lyle did not see the grouper eat the fish, though it acted stunned “because it sat there motionless with this thing sticking out of its mouth.” Source: Grouper Eating Lionfish?