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Turritopsis dohrnii, also known as the immortal jellyfish, is a species of small, biologically immortal jellyfish [2] [3] found worldwide in temperate to tropic waters. It is one of the few known cases of animals capable of reverting completely to a sexually immature, colonial stage after having reached sexual maturity as a solitary individual.
There's evidence to suggest that the comb jellyfish was the first animal to appear on Earth some 700 million years ago. ‘Time-traveler’ jellyfish found to age backward in accidental discovery ...
In July 2020, marine biologists reported that aerobic microorganisms (mainly), in "quasi-suspended animation", were found in organically poor sediments, up to 101.5 million years old, 68.9 metres (226 feet) below the seafloor in the South Pacific Gyre (SPG) ("the deadest spot in the ocean"), and could be the longest-living life forms ever found ...
Like other types of jellyfish, the T. dohrnii goes through a two-part life cycle, living on the sea floor during an asexual phase, where its chief role is to stay alive during times of food scarcity.
The new species of jellyfish is considered “relatively large,” its body reaching just over 1 inch in height and its tentacles measuring over 2 inches in length, the study said.
The medusae of most species are fast-growing, and mature within a few months then die soon after breeding, but the polyp stage, attached to the seabed, may be much more long-lived. Jellyfish have been in existence for at least 500 million years, [1] and possibly 700 million years or more, making them the oldest multi-organ animal group. [2]
Researchers found 182 fossils that were mainly unearthed during the late 1980s and 1990s under the supervision of Desmond Collins, the former Curator of Invertebrate Palaeontology in Royal Ontario Museum. [4] Burgessomedusa fossils are remarkably well conserved within the Burgess Shale, despite jellyfish being approximately 95% water. The Royal ...
Modern-day Wisconsin was once a shallow sea, home to coral reefs, giant jellyfish, pointy-shelled octopus relatives and other interesting creatures. Skip to main content. 24/7 Help. For premium ...