Midnight Zone - Woods Hole Oceanographic Institution

The midnight zone, or bathypelagic, extends to about 4,000 meters (about 13,100 feet), which reaches the ocean floor in many places is in perpetual darkness.

Large Pelagic Predators Found Lurking in Deep Ocean for Unknown

Creatures of the Ocean Twilight Zone

ミッドナイト・ゾーン - DVD/ブルーレイ

Ocean Encounters: Weirdly Wonderful Creatures of the twilight zone

Study Tracks Great White Sharks And Reveals Unexpected Behavior

Illuminating the Abyss - Twilight Zone

ミッドナイト・ゾーン - DVD/ブルーレイ

Woods Hole Oceanographic Institution Sea Grant

How Climate Change Could Affect Life In The Deepest Parts Of The Ocean

Could Listening to the Deep Sea Help Save It? - The New York Times

Ocean Zones Let's Talk Science

Enter the twilight zone: scientists dive into the oceans

In pictures: Bizarre deep-sea creatures revealed, Science

Ocean Zones Let's Talk Science

Where Do Sea Urchins Live - Sea Habitats