Lambis millepeda, the millipede spider conch, is a species of sea snail, a marine gastropod mollusc in the family Strombidae, the true conchs.
Classic lambis design. The legs are round and short in structure. The color extends from white, sand-colored with light brown shades. The underside has black furrows in the mouth. The size of an adult shell varies between 90–201 mm.
This species occurs in the Indian Ocean off Madagascar and in the Southwest Pacific Ocean.