Originally, the elephant mussel is the largest known burrowing bivalve, the scientific name of the elephant mussel is the Pacific submerged mud clam (Panopeaabrupta), also known as the emperor mussel, because of its appearance looks like an elephant's trunk (the elephant's trunk), so it is known as "elephant mussels". The two shells of the mussel are the same size, thin and brittle, with a serrated front, a secondary shell, and a water tube (also known as a tentacle).

Only look at its appearance, it can really make people have some dirty associations, what is the terrier of the mussel, from its appearance in fact, we can speculate one or two. But that's the opinion of experts, the shellfish is more like a male ding-dong than like an elephant's trunk, so it is often connoted by netizens as a fixed terrier and exists.