Wiki claims that the name Jellyfish is in use since 1796. But do you know what makes fish a fish, and why isn’t Jellyfish considered as Fish? And I just fished-up everything!
Ok, Let’s Start Again!
Fish are vertebrates! It means they belong to a group of animals with backbones. Jellyfish is an invertebrate. It means no backbone, and it’s quite obvious from its Jelly-Like appearance.
Now the Public Aquario (that’s the community of Public Aquariums by the way) want to stop the name confusion from getting drifted further. Thus, a new name is being spread worldwide. It’s called Sea-jellies or simply Jellies. Fair enough!
“It isn’t just the backbone that’s missing in Jellyfish!”
“Jellyfish don’t have brain!”…Ahem! And they don’t have heart. But above all, they are 98% water.
“What does this mean? It means if they are washed ashore, they will get evaporated within few hours!”
Jellyfish are Pulsing along the Ocean Currents even before the Dinosaurs!
Jellyfish are one of the oldest marine organisms recorded to date. As they don’t have bones, it’s obvious their won’t be any fossils of them, but researchers have managed to track down their lineage that goes even hundreds years or more before the Jurassic period.
As they are known to exist even before the Dinosaurs….“Did I just say Dinosaurs?” Oh, I presume Jellyfish had no idea what’s happening on the surface. “Some other time Mr.Asteroid. Maybe Never!”
“Transparent, Vibrant, Luminescent!“
– Colors of Jellyfish
While diving deep into the ocean, Jellyfish could be the most fascinating marine animal you will come across. Most of them are transparent, but others can be spotted in vibrant colors such as pink, yellow, purple, and blue. Some are even luminescent. It means they give out their own light.
“Psst! Heard about Jellyfish called Turritopsis nutricula? This Jellyfish is considered Immortal, which means it never dies.
“Here is how it works?”
Whenever this species of Jellyfish feels threatened, it undergoes some “cellular transformation” making its cells go reverse in life, and becomes dormant for a certain period. Once everything gets normal, it quickly reverts from dormant to a fully-functional organism.
Looks like an Umbrella, Stings like a Bee!
In spite of their Vibrant Appearance they are the most stingingly fascinating organism to stay away from.
Jellyfish’s stinging cells are called Cnidocytes. It is located on their wavy tentacles. Cnidocytes are like a tiny compartments that houses a mini needle-like stinger. It all needs is a stimulus to trigger the action. It can stun or paralyze the prey in the vicinity but Jellyfish don’t sting purposely, at least not to Humans.
The sting don’t do much harm to humans but certain Jellyfish are better be avoided as their sting can be really deadly.
“Where is the Mouth?”
Right inside their umbrella-shaped body. The mouth of a Jellyfish serves as the only opening to eat, as well as to discard their body waste. Thank you God for parting us into Homo-Sapiens!
Jellyfish have to digest their food really quickly because if they don’t they would’ve to carry a large, undigested waste around, making it difficult for them to float along the ocean currents.
“Anything else the Mouth does?”
Propulsion! Jellyfish have an amazing ability of propelling themselves by squirting the water from their mouth.
In fact, the way they propel their flexible, umbrella-shaped body Upward and Downward without spending energy, has inspired researchers to create Bio-mimetic Robots with similar bell-like flexible structure.
Eat, and Being Eaten!
Jellyfish are known to feed on small fishes, shrimps, crabs, and even tiny plants. Now when it comes to being eaten, they serve to be the favourite food of Sea turtles. Even the Chinese have fished Jellyfish for more than a century. Jellyfish is a delicacy in Chinese Foods and is also used in Chinese medicine.