Drifting in the ocean for over 650 million years, they attack their prey using stinging cells that inject poison into the organism.
With an estimated 2000 species in the world, this group of invertebrates range in size from one inch to around 200 feet in length. Drifting in the ocean for over 650 million years, they attack their prey using stinging cells that inject poison into the organism. For 10 points—  name this animal species which includes the Lion's Mane and Portuguese Man-of- War that looks like an umbrella when submerged in the water.
With an estimated 2000 species in the world, this group of invertebrates range in size from one inch to around 200 feet in length.
{Jellyfish} or {Sea Jelly}