Hawaiian Top Snail

Trochus intextus

Trochus intextus is a marine gastropod that features a thick, solid shell measuring between 20 mm and 30 mm. The shell has a straightly conical shape, with an acute apex and about eight whorls. Its coloration varies from grayish to corneous white, often adorned with broad longitudinal stripes of red or purplish hues. The base of the shell displays narrow zigzag red stripes. Divers can identify this species by its distinct spiral series of rounded granules on the upper surface and a small, strongly lirate aperture. The body whorl is obtusely angulated, and the columella is irregularly dentate, which further aids in identification. This species is found in the Western Pacific Ocean, particularly off the coasts of Hawaii and the Philippines. It thrives in a benthic environment and is typically located at depths shallower than 40 meters, with most records indicating it resides at depths less than 20 meters. The Hawaiian Top Snail is herbivorous, primarily grazing on algae. Reproduction involves a broadcast spawning method, with embryos developing into planktonic trocophore larvae before maturing into juvenile veligers. Encounters with this species during dives can be common, as it is frequently observed in its natural habitat. The conservation status of Trochus intextus is not evaluated, making it important for divers to observe and report their findings to contribute to ongoing research.