Archaster typicus
... that a male and female pair of sand stars, Archaster typicus, engage in pseudocopulation so that when they spawn, some two months later, they will do so simultaneously?
... that a male and female pair of sand <a href="./Starfish" id="mwB3I" rel="mw:WikiLink" title="Starfish">stars</a>, <i id="mwB3M"><b id="mwB3Q"><a href="./Archaster_typicus" id="mwB3U" rel="mw:WikiLink" title="Archaster typicus">Archaster typicus</a></b></i>, engage in <a href="./Pseudocopulation" id="mwB3Y" rel="mw:WikiLink" title="Pseudocopulation">pseudocopulation</a> so that when they <a href="./Spawn_(biology)" id="mwB3c" rel="mw:WikiLink" title="Spawn (biology)">spawn</a>, some two months later, they will do so simultaneously?