Ruka's dad and the other adults who work at the aquarium are only distantly aware of what the children are experiencing as they get caught up in the mystery of the worldwide disappearance of the oceans' fish. (Source: VIZ Media)

Kaijuu no Kodomo was awarded an Excellence Prize at the 13th Japan Media Arts Festival in 2009. The series was published in English as Children of the Sea by VIZ Media under the SigIkki imprint from July 21, 2009, to June 18, 2013.