It's not a game, it's not an animated movie, and it's not a social media site. Its creators refer to it as a "geosocial web application", but to you and me it could be the next big thing in online entertainment.
The Blu is a mission to create the ocean on the web as an interactive 3D world where every species and habitat is created by digital artists and developers.
One of the brains behind the project is big data specialist Scott Yara, founder of US-based software company Greenplum, which is now owned by EMC. Yara is convinced the web is developing its own form of native media "which is a really, really exciting direction," he enthuses.
"Big data is not only going to change lives - it's going to change art, and it's going to change entertainment," he suggests.
The Museum of Modern Art in New York has already held an exhibition of art inspired by big data, by American computer science graduate Jonathan Harris. But The Blu is something far more ambitious.