3-5years
Sunflower
sunflower star
a star can live for 2000 years
As long as they want
the sunflower sea star
An average star can live about 10 billion years.
king crab
sunflower starfish
The Sunflower Starfish (of Sea Star) is none of the four mentioned in the question. It is an echinoderm, a marine invertebret having a central disc and many arms.
The Sunflower Seastar is from the phylum Echinodermata. It is from the kingdom Animalia, the class Asteroidea, and the family Asteriidae.
It depends on the size. Small, dim stars live much, much longer than large, bright ones. The expected lifetime of a star like the Sun as a main-sequence star is about 10 billion years.
Starfishes Live On For Many Years Is In Bewteen 200-300 Years Old