Are these tentacles immortal? Separated sea cucumber tissue survives on its own for more than 3 years

There are many long-lived creatures in the sea. Glass sponges live for over 10,000 years, and Icelandic mussels live for over 500 years. Some jellyfish and hydras are theoretically said to be immortal. However, what was discovered this time was a slightly different type of "immortality." Canadian research team...