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[Veronica Scott]

Koi



Koi are an ornamental, domesticated variety of the common carp. The are common in artificial rock pools and decorative ponds. Amazingly, some varieties are capable of living more than 200 years. The oldest known koi was Hanako, a fish that died at the age of 226 on July 7, 1977.

[Veronica Scott]

Ocean quahog



The ocean quahog (Arctica islandica) is a species of clam that is exploited commercially.Researchers have interpreted the dark concentric rings or bands on the shell as annual marks, much like a tree has rings. Some collected specimens have been calculated to be more than 400 years old

[Veronica Scott]

Antarctic sponge



Perhaps due to the extremely low temperatures of the Antarctic Ocean, this immobile creature has an extremely slow growth rate. Some estimate the oldest known specimens are 1,550 years old.

[Veronica Scott]

Turritopsis Nutricula Jellyfish



This species of jellyfish might be the only animal in the world to have truly discovered the fountain of youth. Since it is capable of cycling from a mature adult stage to an immature polyp stage and back again, there may be no natural limit to its life span. Because they are able to bypass death, the number of individuals is spiking. ”We are looking at a worldwide silent invasion,”says Dr. Maria Miglietta of the Smithsonian Tropical Marine Institute.