How is figurative language used to convey the speaker's changing attitude in Elisabeth Bishop's poem "The Fish"?

The Fish Elizabeth Bishop's poem The Fish narrates the changing attitude of the speaker towards the fish. First, the fish is described as ancient and grizzled, showing signs of death and decay. However, upon closer inspection, the fish is made out to be a survivor of many battles. Through the use of figurative language, the poet shows the speaker's shift from noting only the fish's dejection to admiring him for his past glories. Bishop begins …

…transforms an old fish the speaker caught into a glorious figure of reverence. Bishop uses personification and analogies to set up the fish as dejected and lacking in spirit. However, the speaker's perception changes and tone is markedly more of admiration while symbolism is added as the remains of the fish's struggle become the trophies of victory. By employing personification and symbolism, Bishop uses figurative language to denote the speaker's changing understanding of the fish.