Most bioluminescent bacteria belong to this family, and are typically found as symbionts of deep-sea animals.

William Beebe - first biologist to observe deep-sea animals in their native environment.

He need not mind sending a diver to hold his breath in the deep seas; he will soon be a deep-sea animal.

Mobile scavenger stage: Big and mobile deep-sea animals arrive at the site almost immediately after whales fall on the bottom.

This deep-sea animal lives between 600-1475 m depth.

Many, perhaps most deep-sea animals produce light.

A total of 70 hours of observations and 102 deep-sea animal and rock specimens were collected during the cruise.

Some deep-sea animals, such as the greeneye, use fluorescence.

It is estimated that 90% of deep-sea animals produce some sort of bioluminescence.

His eyes were blue but with a slit pupil like a cat or a deep-sea animal.