Home / Science / Glowing Sea Slug Discovered in Deep Ocean's Midnight Zone
Glowing Sea Slug Discovered in Deep Ocean's Midnight Zone
25 Aug
Summary
- Monterey Bay Aquarium Research Institute team discovered new sea slug species
- Bathydoris caudactylus swims freely in deep waters between 3,300-13,100 feet
- Produces its own light through bioluminescence

In a remarkable finding, scientists from the Monterey Bay Aquarium Research Institute have discovered a new species of glowing sea slug living in the deep ocean's midnight zone. The team first spotted the "mystery mollusc" back in 2000, at a depth of around 8,500 feet.
Over the past 20 years, the researchers have carefully documented more than 100 of these unique creatures, creating the most detailed description ever made of a deep-sea species. Unlike other sea slugs that stick to the ocean floor, this new species, named Bathydoris caudactylus, freely swims through the water column at depths ranging from 3,300 to 13,100 feet.
The sea slug has a transparent body with a large hood and a flat tail with finger-like edges. Remarkably, it produces its own light through the process of bioluminescence. This discovery opens up exciting possibilities for further ocean research and conservation efforts.
As scientists continue to learn more about the incredible diversity of life in the deep sea, they gain valuable knowledge that can help preserve these unexplored ecosystems and maintain the overall health of the world's oceans for future generations. The study of this glowing sea slug and its adaptations to the extreme deep-sea environment will undoubtedly provide fresh insights into the resilience and complexity of marine life.