Larger, tube-dwelling worm. Often aggregates in clumps. Protected by long, soft, grayish, parchment-like tubes.
Round, thick shell. One of the largest scallops in the world. An orange mantle with sensory tentacles and blue eyes fringes the shell. Permanently attached to substrate, does not detach and swim around.
Large, round creamy-colored or pinkish shell. Soft body is translucent brown or gray. Only found in soft sediment. Lays eggs in a clay-like, round mass.