The world's biggest coral — an organism made up of about a billion polyps — is about three times bigger than the previous record-holder and was discovered by chance during an expedition off the Solomon Islands.

The largest coral in the world has been found in the Solomon Islands. The coral, which is visible from space, is three times larger than the previous record-breaker, and is believed to be about 300 years old.

The world's largest coral has been found in the southwest Pacific Ocean, and scientists say the massive organism is visible from space. The big picture: The "mega coral" near the Solomon Islands that's believed to be about 300 years old and measures 105 feet long by 111 feet wide was discovered by the National Geographic Pristine Seas team,