ABSTRACT The vaccine is alternative to controlling infection of Aeromonas hydrophila. The purpose of this research was to given understand the hematology of (Clarias gariepinus) that was with Aeromonas hydrophila vaccine. This research was conducted in 14 April to 2 June 2019 Riau Of University. The method was an experimental method with a Completely Randomized Design (CRD) with five treatment…