Which poetic device is used in the excerpt from Lowell's "For the Union Dead"?

The old South Boston Aquarium stands

in a Sahara of snow now. Its broken windows are boarded.

The bronze weathervane cod has lost half its scales.

The airy tanks are dry. Once my nose crawled like a snail on the glass;

my hand tingled

to burst the bubbles,

drifting from the noses of the cowed, compliant fish.

The first two verses are the perfect poetic evidence of Robert Lowell's poem. He rhythmically described the loss of the childhood memories in the beginning and continued establishing the development of the character further in the poetry.