Predicted to enable chemorepellent activity; neuropilin binding activity; and semaphorin receptor binding activity. Acts upstream of or within blood vessel morphogenesis and nervous system development. Predicted to be located in extracellular region. Predicted to be active in several cellular components, including axon; extracellular space; and glutamatergic synapse. Is expressed in several structures, including anterior neural rod; brain; head; immature eye; and muscle. Human ortholog(s) of this gene implicated in hypogonadotropic hypogonadism 16 with or without anosmia. Orthologous to human SEMA3A (semaphorin 3A).