Catalyzes the hydrolysis of acyl-CoAs into free fatty acids and coenzyme A (CoASH), regulating their respective intracellular levels (PubMed:16141203, PubMed:16940157). In contrast to its human ortholog, functions essentially as a succinyl-CoA thioesterase with no activity with medium to long chain saturated acyl-CoAs and with a low activity toward glutaryl-CoA (PubMed:16141203, PubMed:16940157). H2O + succinyl-CoA = CoA + H(+) + succinate glutaryl-CoA + H2O = CoA + glutarate + H(+) Lipid metabolism; fatty acid metabolism. Mainly expressed in liver and kidney. Weakly expressed in other tissues including intestine, adrenal gland and adipose tissues. In the liver, by peroxisome proliferator (Clofibrate) treatment, via the peroxisome proliferator-activated receptors (PPARs) or fasting for 24 hours. Belongs to the C/M/P thioester hydrolase family.