Lightning Bug

The Lightning Bug is a critter which spawns only in the Hallow biome. It can be damaged by other mobs including the player, which usually leads to their death.

Lightning bugs spawn during the night but are rarer than fireflies. They can be caught with a Bug net to be carried around and released later, or put inside a bottle to be used as furniture and light source. The bottled lightning bug is animated and moves inside, and cannot be released once crafted.