Skeletonema is characterized by cylindrical cells with a peripheral ring of tubular processes, fultoportula, that runs perpendicular to the valve face and link to those of sibling valves to form permanent colonies of variable length (Zingone et al., 2005). The production and management of Skeletonema costatum cultures can be achieved in a number of ways without adversely affecting the quality of the algal cells produced. In culture condition the phytoplankton growth has been reported to increase with increasing intensity at light up to a point declined thereafter. This trend has been widely reported in many phytoplankton species.