You may have seen one of these squishy little creatures lying on the beach while strolling along the shores of any ocean in the world and tentatively poked at it's tiny little body. They're even featured in the popular 2003 Disney movie "Finding Nemo". But other than these brief encounters, jellyfish are extremely underappreciated and fascinating creatures!
They have no heart, no eyes, no bones, no brain... and their bodies are made up of 95% water! But they still manage to be efficient ocean predators.
The jellyfish is made up of a "bell"-shaped body, which contains a jelly-like substance, as well as tentacles, which are also sometimes called "flaps". These tentacles are used to eat it's prey. The bell is called a medusa, because it resembles the Gorgon Medusa of Greek mythology, with her hair of many writhing snakes.
There are more than 200 species of jellyfish. They range in size from the small thimble jellyfish which resides in the Caribbean, to the Arctic lion's mane, which has a bell that can grow up to 2.5 m (8 ft) in diameter and tentacles that can reach up to 60 m (200 ft) long. That's twice the length of a blue whale! This huge "thing" is also thought to weigh more than 250 kg (550 lb)! All I can say is HOLY MOLY. Imagine coming face-to-face with one of these bad boys.
Some jellyfish move by propelling themselves through the water using jet propulsion, while some of them attach themselves by a stalk to other materials, such as seaweed. Their movement is strongly influenced by the ocean's movement, so therefore they're often known as zooplankton (animal drifters).
So far they don't really seem that harmless... right?
Wrong. They're able to stun and kill their prey with stinging cells called nematocysts. Each tiny cell conatins a harpoon which shoots into the prey and delivers a a debilitating toxin when triggered by touch or movement. The potency of this toxin varies, and reactions in humans ranges from a mild, irritating rash to death. Basically, these puppies don't joke around.
So this was a lot of reading! But hopefully you found it as interesting as I found it. There's still so much more information on the jellyfish that you can research and I KNOW you'll find it fascinating :)
The jellyfish is for sure an underappreciated animal that most people don't know that much about. Thanks for reading! :)
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