Enables N-acylsphingosine amidohydrolase activity. Involved in lipid digestion and sphingolipid metabolic process. Located in caveola; extracellular space; and mitochondrion. Is integral component of plasma membrane. Orthologous to several human genes including ASAH2B (N-acylsphingosine amidohydrolase 2B). [provided by Alliance of Genome Resources, Apr 2022]