The correct option is A True
The starfish does not have a vertebral column i.e, it is an invertebrate.They belong to the group Echinodermata.Their body has pentaradial symmetry, flat body with an oral and aboral pole, five arms radiate from the central plate.The body frame is formed of calcareous plates known as ossicles.The body surface is covered with spines.There is a groove lined by two rows of tube feet by which they move on the substratum.