Coral reef habitat extends from the surface of tropical seas down to a depth of approximatley 500 feet. But only the upper one-third of this habitat has been adequately explored. Dr. Richard Pyle of the Bishop Museum will share how a team of marine biologists has begun to investigate the deep coral reefs using advanced, high-tech diving gear and special gas mixtures, and has discovered more than a hundred new species of fish. His lecture, “Into the Twilight Zone: Exploring the Deep Coral Reefs,” will start at  6 p.m. June 12 at the Atherton Halau. Free and open to the public. Call 847-3511 or visit www.bishopmuseum.org.