Erg, as the sentence stands, it is meaningless. -- IF it is supposed to have a meaning, I would suspect a word-substitution code of some sort. As in, substitute alternatives for each of the nouns and verbs, etc. to decode it. Like: "A sausage wounded a chap." After substitution: "A dog bit a man." Otherwise, I have no clue.
Well, since it seems non-sensical, let's just make something up, shall we? I read thus: Since Pelicans breath through their mouth, a pelican without breath is one whose mouth is full. Since they eat fish mostly, I would say that a pelican without breath is one with a fish in its mouth.
Thus a fish will save a bear if it is like a pelican without breath- or if it has a fish in its mouth.
So a fish can save a bear (by feeding it) if the bear it lucky enough to catch it in its mouth