Generally, lugworms are not poisonous, but it is not ruled out that some species are poisonous. Because there are so many animals in the world that look like lugworms. The Nereis toxin contained in Nereis worms is toxic to other species in the water but not toxic to the human body. Therefore, people in some places dig up Nereis worms to feed chickens, fish, or directly fry them for human consumption. It would be best if you could send more photos so I can see what kind it is