Agnewia tritoniformis (Blainville, 1832)
Common in the Solitary Islands Marine Park. Known from Australia and northern New Zealand. Recorded on the Australian east coast from Caloundra in Qld to Yorke Peninsula in South Australia, including Tasmania. Common in NSW.
Found under rocks and in rock pools. Very common intertidally and subtidally to 20m depth.
Grows to a maximum 35mm length, commonly 20mm.