Vol 6 No 1 (2021) contains a number of studies related to screening of amylolitic potential thermophilic bacteria, in vitro test of antibacterial activity of shell and rubber seed extracts against Aeromonas hydrophila, growth performance of white snapper (Lates calcarifer) fish in the enlargement phase which is feed with different lysine addition, inhibition test of palm oil, garlic, and turmeric against several types to bacteria Vibrio sp., effectiveness of java long pepper extract (Pipper retrofactrum vahl) for masculinization of betta fish (Betta splendens).