Tintinnids are an essential link between nano- and macro- planktons in the food webs of the marine environment. It is also known that tintinnids are one of themajor components of marine planktonic ciliates and has a cosmopolitan character. In the Philippine

The distribution of planktonic ciliates, aloricate (naked) and loricate (tintinnid) was investigated in the open waters of the Oyashio and Kuroshio Currents, Philippine, Sulu, Celebes and South China Seas, and the western and central equatorial Pacific.

Abundance, distribution and population structure of planktonic protozoans in the Southeastern Mediterranean off Egypt were investigated during the period from April 2008 to February 2010. Protozoan population constituted 5.4% of the total zooplankton