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crown-of-thorns starfish

[kroun-uh v-thawrnz]
noun
  1. a starfish, Acanthaster planci, that feeds on living coral polyps, causing erosion and destruction of coral reefs.
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Origin of crown-of-thorns starfish

First recorded in 1960–65
Also called crown of thorns.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018