horned sea star

Scientific name Protoreaster nodosus
Descriptor Linnaeus
Year of description 1758
IUCN category (World) NE
Family Oreasteridae
Genus Protoreaster
Protoreaster nodosus Protoreaster nodosus


Protoreaster nodosus, commonly known as horned sea star, is a salt water echinoderm.

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Who is it?


  • Size
    20 - 30 cm
  • Size
    20 - 30 cm

How to recognize the horned sea star ?

The horned sea star measures between 20 and 30 cm. This echinoderm is multicolore with a predominantly jaune, bleu, vert, orange and rose body.

Behaviour & Life cycle

  • diet
  • Sociability
    living in a group or alone
  • territorial
  • Way of living

The horned sea star is an echinoderm living in a group or alone naturally found on the bottom. This species is scavenger .

Although the horned sea star is non-territorial, it is sometimes aggressive towards other species.


  • Reproduction
    • Active sexual selection

The horned sea star is an echinoderm ovipare.

Harmless species

This species does not represent any particular threats to humans when encountered in its natural environment.

Where to find it?

Where to see this species?

What is its habitat?

Natural environment characteristics

  • Temperature
    25 - 29 °C
  • Depth
    0 - 37 m

Biotope presentation

The horned sea star is most often found at a depth between 0m and 37m. However, it is not impossible to find this species at other depths.

Species of the same biotope

To go further

To read on the web

Sources & Contributions

Participation & Validation

The Fishipedia team and specialist contributors are committed to providing high-quality content. However, although the information comes from scientific sources or testimonials from specialists, the cards may contain inaccuracies.

Aurélien Calas

Aurélien Calas

Adrien Falzon

Adrien Falzon


Translation done with the valuable contribution of our translators, who make this information available to a wider audience. We sincerely thank them for their commitment.

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Where to see this species?

Scientific partners

Same genus

Species of the same biotope

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