It took nearly 25 years for biologists to discover that a swimming and glowing organism in the ocean’s midnight zone was actually a sea slug. It took nearly 25 years for biologists to discover that a swimming and glowing organism in the ocean’s midnight zone was actually a sea slug. Fish and Other Marine Life, Marine Biology, Oceans and Seas, Animal Behavior, Research, Monterey Bay Aquarium Research Institute, Monterey Bay (Calif), your-feed-science, your-feed-animals NYT > Science