The "eel" species are similar in appearance, but it was still surprising to find there were three. One scientist involved, C. David de Santana, said, "These fish grow to be seven to eight feet long. They're really conspicuous," he says. "If you can discover a new eight-foot-long fish after 250 years of scientific exploration, can you imagine what remains to be discovered in that region?"
Electric eel E. electricus (image NOAA: a NOAA page reports they can grow to 10 feet, although no one source is perfect.)