"Space Pirate encrypted data decoded."

The subject of this article is not named in-game.
The current title is from the game's internal data.

Animworm is the filename for a gray creature that resembles an Earth centipede. It appears in Metroid: Samus Returns, and can be seen in the background of many southwest rooms (such as the first and second tower corridors) in Area 3 on SR388, slipping from one hole into another. Since it is only seen in the background, it does not attack Samus, nor can she damage it.

It should be noted that this behavior is very similar to Botwoon in Super Metroid, Serris in Metroid Fusion, and the Fune and Namihe in Metroid: Other M. The creature's face appears to consist of a single large mouth or eyeball, similar to the Charge Beam Beast.