There are over 200 different species of Jellyfish, and they come in all sizes and colors. Jellyfish are found in all oceans of the world and live at varying depths in the water. There are 70 varieties of jellyfish that are known to have venomous stings. Jellyfish have existed for more than 650 million years and are the oldest living creatures on the planet. Jellyfish as a species are older than dinosaurs.
Examples of True Jellyfish are Moon Jellies, Blue Jellies, Mediterranean Jellyfish, Sea Nettles, Blue Blubber, and Neon Jellyfish.
Lion's Mane Jellyfish is the largest Jellyfish known. They inhabit the northern Arctic Sea and northern parts of Atlantic and Pacific Oceans. Lion's Mane Jellyfish is the longest known animal in the world. In 1870, a Jellyfish washed ashore on Massachusetts Bay that had a bell diameter of 7 feet and 6 inches. Its tentacles measured 120 feet.
Jellyfish never stop growing.
Jellyfish are 95% water, with some being 98% water.
Jellyfish are not classified as fish, as they do not have gills or lungs.
Jellyfish breathe by absorbing oxygen through their membrane like skin.
Jellyfish, during different parts of it's life, is able to reproduce sexually and asexually.
Jellyfish have no brain, no blood and no nervous system.
Jellyfish are eaten by many people around the world.
Jellyfish can be kept as pets.
A species of Jellyfish called Granrojo, spanish for “Big Red”, which is between 60-90 centimeters does not have tentacles. It instead has between four and seven short, think arms.
The Box Jellyfish is the most poisonous jellyfish with it's sting being able to kill within 3 minutes. It can move at almost two meters a second. If stung, the odds of getting back to shore and surviving are almost zero. The amount of venom in a Box Jellyfish could kill 60 people.
To learn more about Jellyfish, find your local Jellyfish Chapter, and attend a meeting.