Ive got a female jag about a year and a half old by herself. As a youth she was vibrantly active and she recently became sexually active, laying eggs a couple months back and protecting them vigilantly and aggressively. since then I can't help but notice her sluggishness and general depressed demeanor after her fry never hatched. I feel she is saddened by the futility of her instinctive actions as a creature.