Steelhead

The Steelhead are a Boss Salmonid that appears in Salmon Run in Splatoon 2, and the first to be revealed in the April 12th 2017 Nintendo Direct.

They attack by throwing green colored bombs that pop up from the top of their head. The bombs appear to look like inflating bags. Their bombs are an instant splat, and their blast range is huge, but Steelheads are quite slow. The only way to kill a Steelhead is to use weapons to blow up their bombs right in their face.