Bilateral symmetry is a common feature, yet we come across starfish that has rotational/circular symmetry.

But is there any animal that has no symmetry?

  • 2
    $\begingroup$ I suspect something like a sea sponge won't have any symmetry. $\endgroup$
    – user438383
    Jun 27, 2022 at 17:37
  • $\begingroup$ Starfish are also bilaterally symmetric as larvae and descend from bilateral ancestors. $\endgroup$
    – Bryan Krause
    Jun 27, 2022 at 20:17
  • $\begingroup$ Maybe the abalone family (Haliotidae), but I don't know whether the animal is symmetrical or life-stages. $\endgroup$
    – bob1
    Jun 27, 2022 at 21:04


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