biradial symmetry

Biradial symmetry is a biological term describing an organism that possesses both radial and bilateral symmetry. This means that while there is a central axis from which parts radiate (radial symmetry), there are also specific planes that divide the organism into symmetrical halves, similar to bilateral symmetry.12

In animals, radial symmetry is seen in organisms like jellyfish and sea anemones, where body parts radiate from a central axis. Bilateral symmetry, found in most animals including humans, means the body can be divided into two equal halves by only one plane. Biradial symmetry combines these, allowing for symmetry along a primary axis and two other perpendicular axes. This type of symmetry is observed in comb jellies.32