Rosy Star Snail, also known as the Star Shell
Phylum: Mollusca, Class: Gastropoda, Order: Trochida, Family: Turbinidae, Genus: Astraea, Species: Astraea heliotropium · Turbinidae (Turban and Star shell family) · Gastropod univalve, whole spiral shell with a flattened, star-like shape
Species
Astraea heliotropium
Shell Type
Gastropod univalve, whole spiral shell with a flattened, star-like shape
Family
Turbinidae (Turban and Star shell family)
Size
Approximately 0.5 inches in diameter, representing a juvenile or small specimen. Adults typically range from 1 to 2.5 inches.
Color & Pattern
Vibrant pink and white coloration featuring a striking contrast between the deep rose-pink radiating flames or bands and the pale whitish base. The colors appear natural and glossy, highlighting the spiral whorls centered around a darker apex.
Rarity
Uncommon to Rare depending on the specific location and depth, highly prized by collectors for its brilliant coloration.
Habitat
Found in shallow subtidal to moderately deep marine waters, typically inhabiting rocky reefs, gravel substrates, and algal beds where they graze on algae.
Geographic Range
Endemic to the waters around New Zealand, commonly found along coastal rocky areas and shelf environments.
Description
A charming and compact spiral shell featuring a flattened profile and distinct sculptural ridges. The apex is neatly coiled, leading outward to rounded whorls adorned with rich rose-pink patterns against a porcelain-white background. The aperture is smooth and rounded, completing a robust and visually captivating little marine jewel.
Key Features
Flattened spiral shape, vibrant pink and white radial markings, prominent whorls, and a solid calcareous structure characteristic of the Turbinidae family.
Collector Value
Moderately desirable for shell collectors who focus on Indo-Pacific and New Zealand marine life, particularly valued for specimens exhibiting bright pink hues.
Condition Notes
The specimen appears to be in very good, intact condition with bright natural coloration and minimal surface wear. Collectibility grade: Fine to Gem.
Interesting Facts
Star snails are herbivorous grazers that play an important role in controlling algae populations on rocky reefs. Many species in the Turbinidae family possess a heavy, calcareous operculum.
Ecological Role
Serves as an essential marine herbivore grazing on microalgae and macroalgae, helping to maintain balance in rocky reef ecosystems.
Similar Species
Other members of the Turbinidae family, such as Lithopoma species, which can be distinguished by differences in peripheral spines, coloration, and geographic distribution.
Beach Finding Tips
Best found by exploring New Zealand tide pools during extreme low tides, or by examining shell drift along rocky shorelines and gravel beaches.