Pink coral eggs create spectacle off Amami

Numerous pink coral eggs cover the surface of the sea off the Naze district of Amami, Kagoshima Prefecture, on the night of May 28, 2016. (Photo courtesy of Katsuki Oki)

Pink eggs released by coral contrast with the blue sea water off the Naze district of Amami, Kagoshima Prefecture, on the night of May 28, 2016. (Photo courtesy of Katsuki Oki)

In this photo taken in June 2015, pink eggs released by coral contrast with the blue sea water off the Naze district of Amami, Kagoshima Prefecture. (Photo courtesy of Katsuki Oki)

Stony coral releases eggs in the sea at night under a full moon. (Photo courtesy of the Kuroshio Biological Research Foundation)

Coral releases eggs in the sea off Amami, Kagoshima Prefecture, on June 28, 2011. (Photo courtesy of Katsuki Oki)