Acestrorhynchus isalineae is a species of fish in the family Acestrorhynchidae. It was described by Naércio Aquino de Menezes and Jacques Géry in 1983. It is known from the Madeira Riverin Brazil. It reaches a maximum standard length of 10.1cm (04inches).
The fish was named in honor of Isaline Drecq, wife of Guy van den Bossche, who was a participant in the expedition that collected the type specimens.[1]