Children (8 direct children, 8 direct and indirect children):
Apostichopus japonicus
Japanese spiky sea cucumber
Apostichopus multidentis
Apostichopus nipponensis
Apostichopus nigripunctatus
Apostichopus parvimensis
Warty sea cucumber
Apostichopus leukothele
Apostichopus johnsoni
Apostichopus californicus