字幕表 動画を再生する 英語字幕をプリント (ethereal music) - [Narrator] 150 feet underground in 30 million year old caves an unforgettable sight glitters in the dark. The Waitomo Glowworm Caves in New Zealand are home to about 30,000 endemic Arachnocampa luminosa glowworms. They spend their days spinning silk nests from the ceilings and then lowering threads to fish for prey, much like a spider. The luminescent bead-like strings are spell binding. The glowworms use light to attract prey and burn off waste. The glow is created by a combination of chemicals given off by the glowworm and the oxygen in the air. The caves are ideal for the worms as they need a dark, damp location where their light can be seen. The Waitomo Caves they call home are named after the Maori words wai, which means water, and tomo which means hole or shaft. And although they live deep underground, the journey to see them is never one to disappoint.