Answer:
B. It compares the fish's skin to wallpaper to support the image of a shabby but admirable fish.
Step-by-step explanation:
In this poem, the speaker compares the fish to old wallpaper. He tells us that the brown skin of the fish hung in strips. What this use of imagery conveys is the idea of a venerable, old fish. He is shabby, and not physically impressive necessarily. However, he is admirable and respected by the speaker.