Gastropod

The Gastropod is a flying Hardmode enemy that appears frequently at the surface of The Hallow at night, and fires lasers.

Gastropods are immune to the Confused debuff.

Tips

 * Newer Hardmode players may want to avoid The Hallow's surface at night entirely, as Gastropods fire frequently, spawn often, and their lasers are difficult to dodge -- especially when more than one Gastropod is on the screen (and there usually will be more than one).
 * Gastropods drop much more gel than any other slime, which makes them a perfect source of gel for Flamethrower or torches. Killing gastropods with the former is fast and will yield more gel than you use, making it an efficient way to farm both gel and coins.
 * These could be a reference to Castlevania, as they have a similar appearance to the ones in Castlevania.

Trivia

 * In real life, Gastropods are a class of mollusk that includes snails and slugs. The word "gastropod" is derived from ancient Greek meaning "stomach-foot," which these animals are so named because they appear to crawl on their stomachs.