Ecological Studies on the Jelly-Fish, Aurelia Aurita (Linne), in Urazoko Bay, Fukui Prefecture-Viii. Diel Vertical Migration of the Medusa in Early Fall, 1969

In recent years, accidents caused by flowing of Aurelia aurita medusae into the intakes at thermal or atomic power plants and similar large scaled factories have considerably increased along the coasts of Japan For this reason, the biology, especially the abundance and occurring pattern of this medusa has attracted deep interest not only among biologists but also among engineers. However, so far as we know, in spite of the common and world-wide distribution of Aurelia aurita, there are very few reports dealing with its biology in natural conditions.