Indie game storeFree gamesFun gamesHorror games
Game developmentAssetsComics

That is the Sniper zooid.

It does not come from any species whatsoever, and is instead a random drop from bosses. It is only available in the Early Access version of Sipho that is available on Steam, along with a couple of other similar zooids.

A twitter post mentioned one of them as "Ancient", so I usually call these types of drop-only zooids "Ancient Zooids".