The really large ones look intimidating, especially if you consider that they are predatory animals and they sting their prey before eating them. Can a lion’s mane jellyfish kill you? A very unique jellyfish which can revert back to its premature state when exposed to stress or injury. If verified, it will have been the oldest terrestrial animal in the world. In fact, the oldest Scolymastra joubini is estimated to have lived up to 13,000 years. Yet, humans are realtively safe from death by jellyfish. The jellyfish (Turritopsis nutricula): the only animal considered to be "immortal". This is a list of the longest-living organisms; that is, the individual member(s) (or in some instances, clones) of a species. It is also the jellyfish with longest tentacles. These Sponges are able to experience this longevity thanks to their extremely slow growth and cold water environment. There used to be a show on TV called "All Creatures Great and Small" that covered—you guessed it—animals of all shapes and sizes. no spring chickens The world’s oldest animals from the 500-year-old shark born before Shakespeare to the jellyfish that can live FOREVER Jellyfish are the oldest multi-organ animal, roaming the seas for over 700 million years. Agreeing a current report the eternal jellyfish changes itself from a grown-up over into a child through a procedure known as “transdifferentiation”, in which one type of cell changes into another. The bootlace worm, Lineus longissimus, is quite possibly the longest animal in the world. The largest recorded Lion’s mane jellyfish had tentacles that reached 120 feet long. The lion’s mane jellyfish is the largest jellyfish known and a contender for the longest animal of all time. But if you only focused on the "great" side of things then maybe you can pass this longest animal … The Ocean quahog (Arctica islandica): ability to live up to around 507 years. Its 800-plus tentacles are divided into eight groups and can reach up to 98 feet in length. But don’t go around calling this jellyfish the world’s longest animal. These animals existed 542 million years ago and appear to be the longest living animals in the world, apart from the immortal jellyfish. The stunning—and stinging—lion’s mane jellyfish (Cyanea capillata) ranks among earth’s most beautiful creatures. The bell of the Lion's Mane jellyfish can grow to be over 6 feet in diameter. Did you know that the largest animal in the world is a jellyfish? The world is full of animals of all kinds, and they come in shapes and colors and they’re all so interesting, but have you ever wondered which are the 6 longest animals in the world? These tentacles are extremely sticky. ... Immortal Jellyfish. The immortal jellyfish is most likely the longest living animal since it can possibly live for eternity. Some of the world's longest-living creatures. n 1864 a specimen washed ashore in the aftermath of a severe storm by St Andrews, Scotland, which was more than 55 m (180 ft) long longer than the longest known Lion’s mane jellyfish, the animal which is often considered to be the longest in the world. Top 10 Longest Living Animals. The Three Biggest Jellyfish Species. This species of jellyfish might be the only animal in the world to have truly discovered the fountain of youth. The largest known specimen was found in 1870 off the coast of Massachusetts. Jellyfish and sea jellies are the informal common names given to the medusa-phase of certain gelatinous members of the subphylum Medusozoa, a major part of the phylum Cnidaria. Sponges (Porifera): is the longest living animal, able to live between 13,000 and 15,000 years. The immortal jellyfish lives up to its name. Whilst this means it is biologically immortal, in practice they don’t live forever and get injured and eaten just like other animals. A mature jellyfish … The world's longest animal in the ocean is the lion's mane jellyfish, based on the new study. It is called Cyanea capillata but is commonly known as the lion's mane jellyfish and it is even longer than the blue whale.. Share. These are a type of aquatic Nemertean, or ribbon worm, which have been recorded at lengths about 60 metres, …