The Light Bulb Fish is a fish available in Fish World. It currently costs 5 Fishbucks and can be sold for 750 coins upon reaching adulthood. It is available under the Holiday Fish category. Like the Candy Cane Fish and Rudolph Fish, it is one of the few holiday fish worth Fishbucks that can be adopted. However, when adopted, it will only sell for 50 coins.
Light Bulb Fish

Light Bulb Fish.