Yellow-Coated Clusterwink

Hinea brasiliana

Hinea brasiliana is a small sea snail with a thick, heavy shell that can reach a length of about 21 mm. The shell is narrowly conical, featuring approximately six spiral whorls that may be smooth or have shallow grooves. Its outer surface is initially covered by a yellowish-brown periostracum, which wears away over time, revealing the white shell beneath. This species is native to New Zealand and southeastern Australia, typically found in the mid-littoral zone of rocky shores, among boulders and rubble, and prefers high-energy environments while avoiding the most exposed areas with intense wave action. These snails are commonly found from low tide in crevices and under boulders. They graze on microalgae when the tide comes in and tend to cluster together in moist areas when the tide is out. Hinea brasiliana reproduces through internal fertilization, with embryos developing in a brood chamber before being released into the sea as planktonic larvae. An encounter with Hinea brasiliana while diving may reveal its unique bioluminescent capabilities; when disturbed, it emits short flashes of bluish-green light, which can serve to startle predators. The light, produced by the mantle tissue, shines through the shell, creating a glowing effect that may also attract larger predators to deter threats. This species is abundant in Australia, where empty shells often accumulate on beaches.