Animal Species:Carpet Sea Star

The three most common sea stars in Sydney belong to the genus Patiriella. They may be difficult to see at first because of their small size and excellent camouflage in rock pools, crevices or under boulders.

Carpet Sea Star Patiriella calcar

Dr Isobel Bennett © Australian Museum

Standard Common Name

Carpet Sea Star

Identification

The colour and pattern of individual Carpet Sea Stars vary greatly. They usually have a grey-green background with splotches of orange, yellow or red. You may also notice several tiny sea stars surrounding a larger one.

Size range

5 cm

Distribution

Carpet Sea Stars are found in Queensland, New South Wales, Victoria, South Australia, Western Australia andTasmania.

Habitat

Carpet Sea Stars live on intertidal rocky shores to a depth of 3 m.

Other behaviours and adaptations

The Carpet Sea Star has well-defined arms, whereas the arms of the other two common species in the area (Patiriella exigua and P. gunnni) are not well developed, giving these sea stars a pentagonal or hexagonal shape.

Life cycle

Sea stars from the genus Patiriella differ from most other echinoderms by being 'viviparous', meaning that they give birth to live young. The juveniles develop within the parent.

Classification

Species:
calcar
Genus:
Patiriella
Family:
Asterinidae
Order:
Valvatida
Class:
Asteroidea
Phylum:
Echinodermata
Kingdom:
Animalia

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Tags sea stars, starfish, invertebrates, identification, echinoderms, wildlife of sydney, marine,