Steel Eel
From Inkipedia, the Splatoon wiki
Steel Eels are Boss Salmonids that appear in Salmon Run from Splatoon 2.
Description
It consists of a giant steel fish head and inkjets shooting down ink, with a Salmonid piloting the machine at the tail. Steel Eels are very long, making it easy to get cornered. The inkjets on its body can instantly kill inklings with direct hits, and get in the way of the inklings weapons. The only way to destroy this machine is to splat the Salmonid piloting it from behind.
