Enables 3-hydroxyacyl-CoA dehydrogenase activity. Involved in several processes, including fatty acid beta-oxidation; negative regulation of insulin secretion; and response to activity. Predicted to be located in cytoplasm and nucleoplasm. Predicted to be active in mitochondrion. Biomarker of myocardial infarction and obesity. Human ortholog(s) of this gene implicated in familial hyperinsulinemic hypoglycemia 4. Orthologous to human HADH (hydroxyacyl-CoA dehydrogenase). [provided by Alliance of Genome Resources, Apr 2022]