Commonly known as the Little Blue Periwinkle or Blue Australwink, is a small marine snail native to Australia and widespread around Tasmania's rocky coastlines.
This species is commonly found around and above the high-tide mark on exposed rocky shores, where large numbers often gather in cracks, crevices and sheltered depressions. It is well adapted to surviving long periods out of the water, tolerating exposure to sunlight, wind and changing temperatures.
Like other periwinkles, it feeds by grazing on microscopic algae and lichens growing on rock surfaces, becoming more active when the rocks are damp from seawater or sea spray. It is one of the most abundant marine snails found along southern Australia's rocky shores.
