Which animal does not die of aging?

Online Answer
To date, there's only one species that has been called 'biologically immortal': the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle.
Related Questions 📌
The lion's mane jellyfish (Cyanea capillata), also known as the giant jellyfish, arctic red jellyfish, or the hair jelly, is one of the largest known species of jellyfish. Its range is confined to cold, boreal waters of the Arctic, northern Atlantic, and northern Pacific Oceans..
It lives in the Atlantic, Indian and Pacific oceans, floating near the surface of the water. It's a common sight in Australia and can also be found along the coasts of India, the Caribbean and even the coasts of Florida..
lion's mane jellyfishThe lion's mane jellyfish is one of the largest jelly species in the world, growing to an average length of 1.5 feet (40 cm), but can reach lengths of 6. 2. The lion's mane jellyfish is named after its "mane" of long, hair-like tentacles hanging from its bell..
Dr van der Merwe said jellyfish could cause local allergic reactions to the skin or mouth, or gastrointestinal reactions if eaten. "They can have a bad local reaction in their mouth," she said. "If they swallow them, like this dog – he didn't have any stings – they can have gastro or diarrhoea.
Vinegar is used to stop the venom in stingers. Caution: Do not use ammonia, urine, rubbing alcohol, fresh water or ice. They all can trigger the release of more venom. If you don't have vinegar, move on to scraping off the stingers.