Answer:
"a five-haired beard of wisdom", "frayed", "wavering"
Step-by-step explanation:
These 3 phrases/words compare the fish to an old, experienced soldier because many peope associate a beard with growing old, and "a five-haired beard of wisdom" is assumably referring to the knowledge a soldier could retain from their years of duty. Secondly, when something is frayed, like a sweater, it's running out of material from constantly pulling at it; this analogy could compare a fraying sweater due to constantly pulling at it to an old, exprienced soldier running out of steam or energy due to just being a soldier. Lastly, many old people can develop tremors in their hands and whatnot, which can cause them to shake and waver; the word "wavering" in this excerpt alludes to the claim that it compares the fish to an old, experienced soldier.