Predicted to enable neuropeptide hormone activity; type 2 galanin receptor binding activity; and type 3 galanin receptor binding activity. Involved in several processes, including long-chain fatty acid import into cell; negative regulation of appetite; and negative regulation of renal sodium excretion. Located in cytoplasm. Orthologous to human SPX (spexin hormone). [provided by Alliance of Genome Resources, Apr 2022]