Indeed, to gurutek, this was a clear indication that there was an unwanted presence in the fish tank. And not only was the coral noticeably absent, but a lot of it had also disappeared suddenly. “[I] only noticed because I had whole coral colonies missing after a single evening,” gurutek subsequently wrote on YouTube.
So, as gurutek wanted to identify the uninvited guest, he staged an old-fashioned stakeout. “I first saw it after I spent a few nights [sitting] up [after lights went out],” gurutek explained in his comments. “[I waited] for about three hours per night looking for the critter.”
And when the tank owner finally spotted the creature, he may have been surprised at its identity. That’s because the creature was none other than a Bobbit worm, and it was rather far from home. Bobbit worms are usually found in warm oceans, in fact, buried in the seabed.