Larva or Medusa
protective covering (a lead apron)
Earthworms are covered by a thin skin called epidermis. The epidermis is covered with a thin, protective cuticle that must be kept moist to permit the passage of oxygen through it.
it has a slime body
Armor.
cornea
The protective covering on the package was damaged. She is as protective as a mother hen.
The skin (or hide) and fur are the protective covering of a raccoon.
it's shell..
Enamel.
tegument!
Yes!
In the life cycle of the round worm, a protective, walled-off capsule in which the larvae lie dormant.