It's asymmetrical.
Bilateral symmetry.
Line
bilateral
They have a bilateral symmetry that means that there is only one way you can cut them to get 2 equal shapes.
This depends on the type of prism. If the shapes on the ends are pentagons, the prism has 6 planes of symmetry. If they are hexagons, it has 13 planes of symmetry. It has the same number of planes of symmetry as the shapes on the end have lines of symmetry, plus 1.
Grantia compressa was created in 1780.
Porifera. http://en.wikipedia.org/wiki/Grantia
One type of symmetry is rotation. The second type of symmetry is translation. The third type of symmetry is reflection.
Bilateral Symmetry
There are many features that distinguish grantia as an animal. The main feature is locomotion which is a key feature for animals.
Bilateral symmetry
Bilateral symmetry.
Radial Symmetry
Asymmetry symmetry
Bilateral Symmetry
Arial symmetry
Bilateral symmetry.