This underwater alliance between octopus and fish tends to pay off for both. Learn why the relationship works.

94°E–130°E), the Coral Sea (4°S–26°S, 142°E–174°E) and the Tasman Sea (26°S–46°S, 150°E–174°E). Values are also provided for the Great Barrier Reef (see below for details). These regions are the same ...