The jellyfish is an animal that lives in the sea and biologists call it a "medusa". Jellyfish can be seen off the coasts and can be found on beaches after the tide.  Jellyfish can grow to be 7 feet in diameter or it can be as small as a pea.  Jellyfish are grouped by the number and length of its tentacles.  Jellyfish get their name from the jelly like material that is in them.  This jelly like  material acts like a skeleton and supports them.  A jellyfish has no bones so its body is shaped like an umbrella.  Jellyfish have tentacles containing stinging cells that can inject poisonous threads into its victim.  This poison paralyzes its prey which is then passed to the mouth and eaten.  Jellyfish eat small animals like fish and other small creatures.  Jellyfish will sting humans and if stung by a "Sea Wasp" a person can die within minutes due to the deadly poison.