Selectively catalyzes the oxidative deamination of D-aspartate and its N-methylated derivative, N-methyl D-aspartate. Highest catalytic efficiency for D-Glu followed by D-Asp and NMDA. May play a role in the egg-laying events and early development of the worm, in addition to quality control of the germ cells. D-aspartate + H2O + O2 = H2O2 + NH4(+) + oxaloacetate Belongs to the DAMOX/DASOX family. The conserved active site Tyr residue in position 221 is replaced by a Phe.