A central disk with radiating arms
More than 15 arms
Densely covered with spines
Adults are often dull<unk>  to green colored
some may have bright colors to warn predators
Range from 9-14 inches in diameter
More than 15 arms
some may have bright colors to warn predators
Spines pierce the skin and cause severe pain
Lasting <3 hours
Spines are coated with a slime that is extremely toxic
Lasting <3 hours
Crown-of-Thorns starfish envenomation
Toxins
Stonefish envenomation
Ciguatera
Fire coral envenomation
Scombroid
Cone shell envenomation
Tetrodotoxin 