All About Jellyfish Essay

970 WordsApr 21, 20124 Pages
All About Jellyfish Jellyfish are very unique, aquatic creatures. They are classified in the phylum Cnidaria. The body of a jellyfish consists of 95 percent water, and in some species the percentage can range up to 99. It is umbrella-shaped and made of a soft jelly-like material. The wall of a jellyfish body is very fragile. Their bodies are much different then that of most animals. They have no brain, no respiratory system, and no circulatory system. The average length of a jellyfish tentacle is one to ten meters long. The tentacles of a jellyfish in some cases can grow to a massive length of 100 feet! The longest jellyfish ever found was in Massachusetts with a tentacle span of 120 feet! Located inside the tentacles are the nematocysts or stinging cells which contain venom-filled threads. Jellyfish have only one opening on their body, the mouth. The mouth is located inside a short tube on the center of the body. The sting of a jellyfish is different for each type of jellyfish. They sting by releasing venom from their nematocysts. There are few species that cannot sting at all. The sting of most jellyfish is harmless, but there are a few varieties that can cause death by a single sting. Jellyfish sting for The following two reasons: to capture prey and for defense or protection. The habitat of a jellyfish is very spread out. They live in all four oceans. Some live in tropical regions, some live in temperate regions, and some live in arctic regions. Jellyfish can be either freshwater or saltwater jellyfish. They can be found in all levels of water. Jellyfish are carnivores. They capture their prey by trapping it with their tentacles and injecting it with venom. This will either paralyze or kill the prey. The jellyfish then eats it by using

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