Final answer:
John Milton did not write a poem specifically about the sea, but his contemporary John Donne touched on themes related to the sea and the changing world. The sea in poetry often symbolizes life's challenges and the power of nature.
Step-by-step explanation:
John Milton, a prominent English poet, is not typically known for writing poems explicitly about the sea. His works largely concentrate on themes of religion, politics, and literature. Poems about the sea from Milton's era might discuss the ocean as part of larger themes or use it symbolically, but Milton himself didn't dedicate a specific well-known poem to the subject of the sea. Instead, other poets such as John Donne wrote about the changing world and the sea in their works, including Donne's "Anatomy of the World," where he laments the loss of old certainties.
When discussing the sea in poetry, it is often useful to look at the context in which specific elements, such as the sea or nature, are capitalized, as pointed out in the related question about Wordsworth. Capitalization can signify the importance or personification of these elements within the poem, suggesting a lifelike or grandiose presence that intersects with the poem's thematic concerns. The sea in poetry is frequently a metaphor for life's challenges, nature's power, and the unknown.