How do starfish reproduce?

Starfish commonly reproduce by free-spawning: releasing their gametes into the water where they hopefully are fertilized by gametes from the opposite sex. To increase their chances of fertilization, starfish probably gather in groups when they are ready to spawn, use environmental signals to coordinate timing (day length to indicate the correct time of the year, dawn or dusk to indicate the correct time of day), and may use chemical signals to indicate their readiness to each other.

Fertilized eggs grow into bipinnaria and later into brachiolaria larvae, which either grow using a yolk or by catching and eating other plankton. In either case, they live as plankton, suspended in the water and swimming by using beating cilia. The larvae are bilaterally symmetric — unlike adults, they have a distinct left and right side. Eventually, they undergo a complete metamorphosis, settle to the bottom, and grow into adults.

Starfish may also reproduce asexually, in a way, because most species of starfish have the ability to regenerate lost limbs. However, this ability may also be taken to the next level, as some starfish species have fish in which a new starfish may also grow from a lost limb. For example, if all five legs of a starfish are divided, five new starfish may result from these lost limbs. This probably occurs because the necessary organs and nutrients for survival are in each limb.

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the same way humans & most animals do. .