I was sifting through substrate doing some cleaning when this guy popped out. 4 inches or so in length. Is anyone able to ID it? Is it harmful, beneficial, or benign? Any help is appreciated
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I would need to see the head, but it looks like a Eunicid (= bobbit) worm of some sort. all Eunicids are predatory as far as I'm aware, so I would get it out ASAP.