• Abysses
• Areas explored by submarines
• Bathyscaph's milieu
• Bathysphere's milieu
• Bathyspheres explore them
• Discard
• Dispose of
• Far in yon azure ___: Longfellow
• Fathomless waters
• Heavy white blanket?
• Lanternfish milieu
• Lanternfish's home
• Literary oceans
• Ocean areas
• Ocean features
• Ocean trenches
• Oceanic abysses
• Oceans
• Oceans and seas
• Oceans, in poetry
• Oceans, poetically
• Oceans, to Longfellow
• Oceans, to poets
• Place for sunken treasure
• Poetic profundities
• Rise O Days from Your Fathomless ___ (Whitman)
• Seabeds
• Spots hard to fathom
• Submarine areas
• They're hard to fathom
• Undersea regions
• Vast abysses
• Vast extents
• Vast waters