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  1. Hvězdice trnová koruna (Acanthaster planci, synonymum trnová koruna nebo hvězdice trnitá) je velká dravá mořská hvězdice. Žije v teplejších mořích prakticky po celém světě. Je velkým nebezpečím pro korálové útesy. Trnová koruna je po hvězdici Pycnopodia helianthoides druhou největší hvězdicí na světě – v rozpětí dosahuje 25–30 cm. Obvykle má 14–18 ramen.

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