Autumn coccolithophores in Tomari (SEM image)
Umbilicosphaera sibogae (LM image)
Diveristy and abundance of coccolithophore increase in autumn in this area. Rhabdosphaera, Umbilicosphaera, Discosphaera and Syracosphaera appear in early autumn, then Oolithotus, Anthosphaera and Florisphaera appear in late autumn