He heard, and from his watery shroud, As bursts the sun from autumn cloud, Rose swiftly, crowned with plant and tree, And stood above the foamy sea. There with his lofty peaks upraised Bright as a hundred suns he blazed, And crest and crag of burnished gold Flashed on the flood that round him rolled.

In plain words: Mainaka hears the Sea and rises quickly out of the water, covered in plants and trees. Its golden peaks shine as bright as a hundred suns above the waves.