This animal life span was potentially for ever
This is one of the interesting truth what we are explaining below. There is one species which was immortal. Turritopsis dohrnii is one of the special Jellyfish species which having the lifespan forever. Many scientists have proved that Turritopsis dohrnii was only the species on the earth which having a life span forever, But the size of this Jellyfish was very tiny both width and height of this Jellyfish were around 0.20 inches. Which makes it looks very tiny.