JellyFish Facts

Big Jellyfish

Big Jellyfish picture

Big Jellyfish

With so many different varieties of jellyfish in the world it comes as absolutely no surprise that jellyfish come in a very large range of sizes. The largest jellyfish species comes in at a whopping size of up to 8 feet or 2.5 metres in diameter with tentacles which can reach 60 metres or 200 feet in length. A good comparison to help bring those immense measurements into perspective is that the tentacles of this particular monstrous jellyfish species are around the same length as two blue whales.

The weight of this gigantic jellyfish is consistent with its size with this jellyfish weighing in at about 250kg which is around 550 pounds. The name of this monstrous marine dwelling creature is the Arctic Lions Mane Jellyfish. This species is the largest known species of jellyfish. This particular breed of jellyfish resides primarily is the cold and boreal waters of the Arctic, Northern Pacific and Northern Atlantic oceans. This jellyfish is rarely even found any further south than 40 degrees North Latitude. There are similar jellyfish which may possibly be the same species are known to be residing in the seas off of Australia and New Zealand.

The largest specimen of this species of jellyfish ever recorded was found in 1870 washed ashore in Massachusetts Bay and was longer than the length of a blue whale not including its tentacles. The blue whale is commonly considered to be the largest animal in the world. The jellyfish aren't considered to be highly dangerous. They will sting and it will indeed be rather painful causing pain, discomfort and irritation but there has only ever been one fatality in relation to a sting from this ocean giant to date. Due to this jellyfish being a cold water species it is not physically able to cope with the warmer waters.

These jellyfish live generally only for about twelve months and although they usually live a deeply submerged life at around 20 to 30m in depth and then they tend to make their way to live closer towards the water's surface as they near the end of their lifespan. These giants feel mostly on zooplankton, small sized fish, ctenophores and moon jellyfish. There are animals which prey on these jellyfish though, animals such as larger fish, some other jellyfish species, sea turtles and seabirds. These animals tend to prey on these jellyfish but only when they are smaller in size.

The ocean dwelling giant can be quite breathtaking to see in real life especially if you are lucky to personally witness one of the larger sized specimens swimming through the waters in its natural environment. These jellyfish aren't shy as they are quite regularly seen although it is assumed that the larger species that give blue whales a run for their money in size tend to somehow avoid human interaction, whether this be simply because we aren't looking in the right places at the right time or possibly because these gigantic specimens are dwelling at deeper levels in the ocean than there more regularly sighted family members.

For more information on this jellyfish and many others take a look at our Jellyfish Species list section.

Learn more about Jellyfish, different Jellyfish Species, general Jellyfish Information, Jellyfish Pets and Jellyfish Safety

Written by and Sudarsana Sinha.

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