Sponges exhibit a unique form of symmetry known as asymmetry, which is characterized by a lack of a definite shape or symmetrical structure. Unlike other animals such as jellyfish or starfish that show radial symmetry, sponges do not have a uniform pattern across their body.
Most sponges fall into two categories when it comes to their body structure: asconoid and leuconoid types. Asconoid sponges have a simple tube-like structure, while leuconoid sponges possess a more complex, branched structure. However, despite their different forms, they still lack true symmetry.
Some species of sponges exhibit a weak form of radial symmetry, especially in the arrangement of their canals. This means that while they may not be symmetrical in the traditional sense, certain aspects of their organization can appear symmetrical. Overall, sponges are primarily asymmetrical, making them quite distinct in the animal kingdom.