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 ...
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 ...
The star shape of the starfish (five arms) is intriguing to many marine aficionados. But how it came to be is a question not many can answer. It is due to a gap in the fossil record of echinoderms, ...