an asymmetrical body plan
Sponges are asymmetrical, although a few species have nearly radial symmetry.
body symmetry
sponges have no symmetry animals with radial symmetry are radiata and cnidaria, like jellyfish
Sponges really don't have any kind of symmetry.
Sponges really don't have any kind of symmetry.
Most animals are symmetrical in their body plans, which doesn't necessarily mean that they are perfectly symmetrical.Humans for instance, have two, you can place a mirror right in the middle of a person and it will produce an image of the corresponding side. Humans and most mammals are said to be bilateral (two sides).Starfish for instance have more than two, they have radial symmetry.Some members of the animal kingdom do not have any symmetry in their body plans. A good example would be the more primitive of animals, the Poryphera (sponges). Sponges are asymmetrical (do not have symmetry).
Sponges
Finger sponges do not have any type of symmetry. Finger sponges can grow fingers where ever they have space so they are asymmetrical.
Sponges are asymmetrical. Organisms in Cnidaria have radial symmetry while organisms in Arthropoda exhibit bilateral symmetry.
Sponges mostly have no symmetry, but it is possible to have a sponge that exhibits radial symmetry. They never have bilateral symmetry.
The porifera phylum contains animals that have no tissues or body symmetry. The animals belong to parazoa subkingdom and belong to the Animalia kingdom.