Zapfish appear similar to an Anglerfish or Catfish, and a light bulb's filament. They seem to have a large head with two small eyes, two nostrils, and a big pair of orange lips. Below the head is a smaller body.
Since time immemorial, a rare type of electric catfish known as the Zapfish has been prized by Inkling society as a source of energy. In fact, the entire city of Inkopolis is powered by a single 100-year-old Great Zapfish.