Extinct (Extinction)
By the way they look, (their bone structure, body weight) and DNA too.
so it does not get extinct
Extinct.
"Examples of organisms in the starfish?"
No, biological species concept is NOT useful for extinct organisms at all, nor organisms that reproduce asexually; it is only useful for organisms that produce sexually.
There are many organisms that once lived on Earth but have since gone extinct. Some examples include every species of dinosaur, dodo birds, and golden toads.
alive
Aliens
The are examples of stromatolites still living. They are not extinct.
Biogeography
Bacteria and viruses are examples of prokaryotic organisms.