The light it emits is so bright that it can illuminate the sea's surface from a depth of over three miles.
It blinds prey with an intense burst of light, then swallows the immobilized prey in a single gulp.
This POKéMON uses the bright part of its body, which changed from a dorsal fin, to lure prey.
LANTURN is nicknamed “the deep-sea star” for its illuminated antenna. This POKéMON produces light by causing a chemical reaction between bacteria and its bodily fluids inside the antenna.
LANTURN is known to emit light. If you peer down into the dark sea from a ship at night, you can sometimes see this POKéMON’s light rising from the depths where it swims. It gives the sea an appearance of a starlit night.
— Pokédex entries (via PokeAPI)