Deep Sea Snailfish

Deep in the ocean, there's said to be a snailfish with sapphire-like eyes. One fisher, after casting his line, dozed off. When he felt a tug, he awoke to find his line had unraveled all the way down to the depths. After an hour-long struggle, he reeled in a creature with eyes as dazzling as sapphires, something he'd never seen before. In the city, a noble was so taken by the fish's eyes that he paid a fortune for it. He crafted a ring from the eyes and sold the specimen to eager scholars. These scholars, noting its snailfish appearance and deep-sea origins, named it the deep sea snailfish.