The relationships between physico-chemical parameters, planktonic groups, of African catfish (Clarias gariepinus) at Al-Mahmoudia canal and Nubaria canal. The water Seasonal determination of some environmental factors: water temperature, pH, electrical conductivity, water transparency, dissolved oxygen, nitrate, nitrite, silica, biological oxygen demand and chemical oxygen demand. Were carryout in an attempt to explain that this parameter are the most factors affecting on the density and distribution of the plankton in the investigated African catfish. Plan is developing to take advantage of study the environmental parameters (Physico-chemical characters), abundance and diversity of plankton of the investigated regions water due to their great impact on African catfish.