Small giant spider conch shell for sale, with several finger like spines projecting from the body of the shell. The tips have been machine edged and some are broken.  The exterior of the shell may have a brown skin that has not been fully removed. These spider conchs will measure between 8 inches and 9-3/4 inches in size are  referred to as Seba's Spider Conch, Lambis truncata, and are found in the Pacific and Red Sea in shallow water.  Giant spider conchs are tan shells with a peach color interior and are large decorative seashells.