No, members of the phylum Mollusca do not have radial symmetry. Instead, they exhibit bilateral symmetry. This means that their bodies can be divided into two mirror-image halves along a single plane. Bilateral symmetry is a common characteristic among many animal groups, including mollusks.
Mollusks, such as snails, clams, and octopuses, have a distinct head and tail region, as well as a dorsal (upper) and ventral (lower) side. This body plan allows for more complex movements and behaviors compared to animals with radial symmetry, which are typically sessile or slow-moving.
Radial symmetry, on the other hand, is seen in organisms like jellyfish and sea anemones, where body parts are arranged around a central axis. This type of symmetry is advantageous for animals that are stationary or float in water, as it allows them to interact with their environment from all directions.
In summary, mollusks have bilateral symmetry, which is a key feature that distinguishes them from radially symmetrical animals.