1) Beam symmetry – branched body shape – the ability to catch prey, to defend from any side
2) Stinging cells – serve to defend and attack, focused on tentacles.
3) Skeletal support and protective formations. Lime skeleton – the support of the body, protection against damage, a device that makes the body more durable. Such skeletons are widespread among sedentary animals, for example, in the form of continuous internal skeletons, as, for example, in corals
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.