Animals with symmetry have body parts that match up like mirror images. Animals with sphere-shaped bodies have spherical symmetry. Those with radial symmetry have body parts that extend outward from a(n) central point. Animals with two sides have bilateral symmetry. These animals have definite front and tail ends and upper and lower sides. Invertebrates most commonly have radial or bilateral symmetry. Some organisms do not have symmetry. One example of an animal without symmetry is a(n) sponge.