I just saw a batch of cuttle eggs in my tank again today, but Ive never seen any sex going on (unless they are pretty private). Ive assumed this current batch were all females, because ive seen no displays of aggression (zebra striping) or mating. This probably means this batch of eggs are duds...sigh These guys are 7 months old... I may take a break from bandensis after this batch..Id really like an officianlais though!!