Answer:
The central idea of this poem is the theme of piracy, and the exploitation of the sea by the dominant powers. The poem describes how the men who know the sea like their mother, and are intimately connected with it, fight against the large ships that pollute and exploit it. The poem portrays the sea as a powerful, almost sentient entity that is suffering from the actions of humans. It also highlights the power dynamics at play, with the pirates being seen as the underdogs who are fighting against the powerful and wealthy. Ultimately, the poem suggests that the pirates are fighting for a cause, even if it is not a legal one, and that they are willing to risk their lives to protect the sea and their way of life.