Wholesale  Tibia delicatula conch seashells in bulk, Tibia delicatula, measure between 3-1/2 and 4 inches in length. Tibia delicatula is a species of sea snail, a marine gastropod mollusk in the family Strombidae, the true conchs.  These wholesale tibia delicatula conchshells in bulk are off white shiny shells found in the Indian ocean in intertidal to moderate depths. Tibia delicatula conch shells are used in seashell crafts, shell baskets, glass containers and in making seashell mirrors, wreaths, ornaments and shell characters.