A mysterious deep-sea creature appeared in Monterey Bay. Now scientists are finally telling the world San Francisco Chronicle‘Devious’ New Deep Sea Creature Hid Its Identity From Scientists The New York TimesGhostly Creature Deep in The Ocean Is Like Nothing We've Seen Before ScienceAlertMBARI researchers discover remarkable new species of swimming sea slug Monterey Bay Aquarium Research InstituteA glowing, deep-diving sea slug mystified scientists.