Any of various marine gastropods of the genus Murex common in tropical seas and having rough, spiny shells, especially M. trunculus, the source of Tyrian purple.

• 骨螺一种盛产在热带海洋的海生骨螺属腹足类动物，壳粗糙而常有棘尤指m。trunculus，泰尔紫的来源