Hypostomus Plecostomus or the common pleco, is a tropical freshwater fish belonging to the armoured catfish because of the longitudinal rows of armour-like scutes that cover the upper parts of the head and body. The lower surface of head and abdomen is naked soft skin. H. Plecostomus prefer to live in water between 22.2 to 30 degrees Celsius, with a pH between 6.5 and 7.5