lightless

While you can’t help but appreciate the cherry red of the deep-sea atolla jellyfish, you will also learn why its unusual pigment persists in the lightless depths.

Penelope willed her heart not to race as she led them up the lightless stairs.

Much of the deep ocean is vacant, with extremely cold, lightless regions making it difficult for life as we know it to survive.

Today, there are more than 300 species of anglerfish, which makes them the most varied family of vertebrates in the ocean’s lightless zone.

The incident left her concussed, needing to stay in a lightless room for five days and only worsened the chronic migraines she has battled as an adult.