Coralliophila radula (A. Adams, 1855)

Distribution: 

Reasonably common throughout the Solitary Islands Marine Park. In Australia recorded from around Geraldton in Western Australia north to the Timor Sea, the Great Barrier Reef in Queensland south to northern New South Wales. Also recorded from the Kermadec Islands in New Zealand.

Ecological Notes: 

Often found in small groups nestled in the depressed centre of plate or vase shaped corals. Predates on scleractinian corals.

Additional Notes: 

Well camouflaged by algal growth. Characterised by annular grooves on the shell and purple colour of mouth of shell. Grows to 28 mm.

References: 

Atlas of Living Australia website at https://bie.ala.org.au/search?q=Coralliophila+radula. Accessed 29/10/2018.