A crown-of-thorns starfish (Acanthaster planci) feeds on coral near Cocos Island, Costa Rica.

acanthaster acanthaster planci animal animal themes animals in the wild asteroidea beauty in nature biodiversity bizarre central america cocos island color image coral triangle costa rica crown of thorns starfish danger day echinoderm ecosystem environment feeding fish habitat horizontal invertebrate nature no people ocean ominous one animal outdoors photography pink reef sea sea life sea stars seascape sharp spiked starfish symbiotic relationship thorn tropical climate undersea underwater wilderness wildlife zoology