Upside-Down Catfish (Synodontis sp.) are found throughout freshwater habitats in Africa. Their

Upside-Down Catfish (Synodontis sp.) are found throughout freshwater habitats in Africa. Their belly-up swimming behaviour is thought to be an adaptation to algae grazing on the underside of logs. Also known as “squeakers”, they can rub their pectoral fin spines to produce sound when they are frightened or disturbed. 

Photo:Mun Sing