* Radial symmetry: This type of symmetry is characterized by the body being organized around a central axis, like a pie. Any cut through the center creates two mirror-image halves. Examples include sea anemones, jellyfish, and starfish.
* Bilateral symmetry: This type of symmetry is characterized by the body being divided into two equal halves along a central axis. It is often associated with cephalization (the development of a head) and more complex movement. Examples include insects, worms, and humans.
* Asymmetry: Some invertebrates, like sponges, lack any defined body symmetry.
* Pentaradial symmetry: This is a specialized form of radial symmetry found in echinoderms like starfish, sea urchins, and sea cucumbers. Their body is organized around five arms or sections.
In addition to these basic types, there are also some invertebrates that exhibit more complex forms of symmetry, such as spherical symmetry in some microscopic organisms.
The type of body symmetry an invertebrate possesses is closely related to its lifestyle and environment. For example, radially symmetrical animals are often sessile or slow-moving, while bilaterally symmetrical animals are typically more mobile and complex.
