Given that adult deuterostomes typically display bilateral symmetry, what is the evolutionary significance of the radial symmetry in starfish?

It is known that starfish, as well as the larvae of echinoderms, exhibit bilateral symmetry, however, at the time of metamorphosis, this is substituted with radial symmetry. The fundamental importance of radial symmetry is that it is suitable for the animals, which do not move, and this symmetry helps these species to reach into their surroundings from all the sides.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

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