Southern Ribbed Top Snail

Austrocochlea constricta

Austrocochlea constricta features a thick, solid shell that is imperforate, with a height ranging from 15 mm to 32 mm and a diameter between 22 mm and 28 mm. The shell's coloration varies from ashen or whitish to nearly unicolored, often marked with black zigzag lines or spiral stripes. The conical spire culminates in an acute apex, and the body whorl is characterized by about seven strong carinae. This species is endemic to Australia, found off the coasts of New South Wales, South Australia, Tasmania, Victoria, and Western Australia. It typically inhabits shallow waters, with all recorded occurrences being shallower than 40 meters, and 90% found at depths of around 10 meters or less. Southern ribbed top snails are herbivorous, primarily grazing on algae. Their breeding habits are not detailed in the sources, but like many marine gastropods, they may engage in external fertilization. Encountering this species while diving can be intriguing, as they often inhabit rocky substrates, making them somewhat cryptic against their surroundings. Divers should be observant to spot them among the rocky reefs and other marine structures. While the conservation status of Austrocochlea constricta is not explicitly mentioned, divers should always be mindful of their environment and the impact of human activities on marine life.