what secrete a mucous covering over their exterior to help protect from predators and parasites
snakes Pests hawks birds bats humans fish Anthax
A B C D E F G H
what secrete a mucous covering over their exterior to help protect from predators and parasites (A) snakes (B) Pests (C) hawks (D) birds (E) bats (F) humans (G) fish (H) Anthax