Turbinate Monodont

Phorcus turbinatus

Phorcus turbinatus, or the turbinate monodont, is a marine gastropod that features a solid, thick, and conical shell. Shell sizes range from 15 mm to 43 mm, and they are typically whitish with shades of gray, yellow, or green, adorned with spiral series of reddish, purple, or chocolate blotches. The shell has about six slightly convex whorls and an oblique aperture with a smooth, pearly inner lip. The species is found in the Mediterranean Sea and the Exclusive Economic Zones of Greece, Portugal, and Spain, including the Canary Islands. It inhabits depths shallower than 40 meters, with most occurrences recorded at depths less than 20 meters. This species primarily grazes on algae and is herbivorous in nature. Breeding habits are not detailed in the sources, but like many marine gastropods, they are likely to have a reproductive strategy involving external fertilization. Encountering the turbinate monodont while diving can be a notable experience, as divers may observe them clinging to rocky substrates or among seagrass beds, where they blend into their surroundings.