Tubeworms

One of the longest living animals in the world is the Tubeworm. A tubeworm is any worm-like sessile invertebrate that attaches its tail to the seafloor and secretes a mineral tube around its body into which it may withdraw its complete body.

Tubeworms are invertebrates that live for a long time in the deep sea's chilly, stable environment. According to a 2017 study published in the journal The Science of Nature, Escarpia laminata, a species of tubeworm residing on the ocean floor in the Gulf of Mexico, may live for up to 200 years, with some individuals lasting for more than 300 years. Tubeworms have a low death rate due to a lack of natural hazards, such as predators, which has allowed them to adapt to having such long lifespans.

Age: 300 + years old