What is a lanterfish?

Answer 1

A lanterfish is a fish (obviously) that has a stem coming from its body and from the stem is a small light bulb like thing that gives off light.

Answer 2

A lanternfish is a small, deep-sea fish known for its bioluminescent qualities, which it uses to attract prey and communicate. They are an important part of the marine food chain, serving as a source of food for larger predators in the deep ocean. Lanternfish are abundant in oceans around the world.