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crown-of-thorns starfish

American  
[kroun-uhv-thawrnz] / ˈkraʊn əvˈθɔrnz /

noun

  1. a starfish, Acanthaster planci, that feeds on living coral polyps, causing erosion and destruction of coral reefs.


Etymology

Origin of crown-of-thorns starfish

First recorded in 1960–65

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

There has been some success with the Australian government's crown-of-thorns starfish culling programme, which has killed over 50,000 starfish by injecting them with vinegar or ox bile.

From BBC • Aug. 5, 2025

The crown-of-thorns starfish is nature's ultimate coral predator, with a circle of life perfectly adapted to warming waters.

From Science Daily • Oct. 18, 2023

Another AU$253 million will support the Great Barrier Reef Marine Park Authority, which manages the world’s largest coral reef ecosystem, in efforts to reduce threats from the crown-of-thorns starfish and to prevent illegal fishing.

From Seattle Times • Jan. 28, 2022

While snorkeling, we were warned to steer clear of the pretty but pointed crown-of-thorns starfish, and more than once we spotted a venomous scorpionfish lurking along the bottom.

From Washington Post • Oct. 1, 2020

Villagers are also removing the crown-of-thorns starfish, which eat coral, from the reef.

From New York Times • Oct. 24, 2018

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