Fertilization of the starfish Astropecten aurantiacus.
D000177:Acrosome / Q000502:physiology / Q000648:ultrastructure; D000818:Animals; D005260:Female; D008297:Male; D008564:Membrane Potentials; D009865:Oocytes / Q000502:physiology / Q000648:ultrastructure; D013084:Sperm-Ovum Interactions; D013094:Spermatozoa / Q000502:physiology; D013215:Starfish / Q000502:physiology*