Chlorophyll-a is one of indicator’s level in fertility waters that be found in phytoplankton. The distributed of Chlorophyll-a concentration can be indication that so many fish in the waters. One of potential fishing in Hindia’s ocean, west Sumatera section is Thunnus obesus and Thunnus albacares to identifed the content of Chlorophyll-a can be used aqua MODIS satelite. The goals of this re…