Enables fatty acid elongase activity. Involved in fatty acid elongation, polyunsaturated fatty acid and very long-chain fatty acid biosynthetic process. Acts upstream of or within very long-chain fatty acid metabolic process. Predicted to be located in endoplasmic reticulum. Predicted to be integral component of endoplasmic reticulum membrane. Is expressed in several structures, including brain; liver; paravertebral ganglion; sensory organ; and urinary system. Orthologous to human ELOVL2 (ELOVL fatty acid elongase 2). [provided by Alliance of Genome Resources, Apr 2022]