EEL v7, Cobra Frogman, was released as part of the 2014 50th Anniversary Series. He was the driver/pilot of the Night Raft, packaged with Flint v21 and the V.A.M.P. Mk-II in the Danger at the Docks set. Eel came with a lot of gear, which can easily be lost.
Many collectors complained about paint quality issues with the 50th Anniversary line. If you're looking to get one in mint shape, get great shots of the paint from multiple angles, even on figures still sealed in their bubble.