Leptasterias hexactis was created in 1862.
Leptasterias aequalis was created in 1862.
The answer is entirely dependant on the species to which you refer, and there are over 2000 known species of starfish to choose from. Generally speaking the lifespan is longer in larger species. For example, Leptasterias hexactis reaches sexual maturity in two years, and lives for about ten years in total, while Pisaster ochraceus reaches maturity in five years, and may live to the age of 34.
No, the male and female release their gametes into the environment where they will meet oppositely sexed gametes. Although some species brood their eggs (sit on them) and one species i know of Leptasterias tenera broods the eggs in its pyloric stomach.
Created By was created in 1993.
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it was created in 2006