Almost all animals have symmetrical bodies. Bilateral symmetry is almost universal in all animals and is only very rarely broken—with exceptions like the five-armed starfish or crab species that have one large and one small claw.
source https://phys.org/news/2025-07-bilateral-symmetry-unusual-fish-puzzle.html
source https://phys.org/news/2025-07-bilateral-symmetry-unusual-fish-puzzle.html