species: Iconaster longimanus in ALA: LIRS and surrounds using records to Oct. 2021 (Lizard Island Field Guide)
Iconaster longimanus

©Anne Hoggett: Iconaster longimanus, long radius 65 mm, at Lizard Island, 20 metres depth on sand

©Anne Hoggett: Detail of abactinal surface, Iconaster longimanus at Lizard Island

©Anne Hoggett: Oral surface, Iconaster longimanus at Lizard Island
Kingdom Animalia
Phylum Echinodermata
Class Asteroidea
Order Valvatida
Family Goniasteridae
Genus Iconaster
Species Iconaster longimanus



Distinguishing features

An unmistakeable seastar found on soft bottoms in water deeper than 20 metres. Narrow arms, flat upper surface without granules or other ornamentation. The upper row of marginal plates on each side of the arm meet for most of the arm length. Colour is variable.


  • Size data has not been obtained.

Depth range

  • Depth range data is not yet available.



©Atlas of Living Australia: Australian distribution

Local abundance

  • Lizard Island: Uncommon

Web resources


References that assist with identification

  • Marsh, L.M. and J. Fromont (2020). Field Guide to shallow water seastars of Australia. Western Australian Museum, Perth.