asymmetrical
No one organism really needs symmetry. When you think of symmetry though, you usually think of bilateral symmetry. This is when two sides of an organism are almost identical. The sponge just grows whichever way it pleases.
Bilateral symmetry
Lateral Symmetry.
bilateral symmetry
turn symmetry
Radial Symmetry
Bilateral symmetry.
Bilateral symmetry. All humans have bilateral symmetry.
Radial Symmetry
Bilateral symmetry
Bilateral symmetry
Generally radial symmetry