Researchers have discovered a huge colony of an elusive and brightly colored shellfish species – numbering at least 100 million – in coastal waters in the west of Scotland. Flame shells (Limaria hians) are a small, scallop-like creature with neon orange tentacles. The creatures build nests by binding gravel and shells together with thin wiry threads.
Nina Sen is a frequent contributor to Live Science’s Life’s Little Mysteries series: an exploration and explanation of our world’s phenomena, both natural and man-made. She also writes astronomy photo stories for Live Science's sister site Space.com.