Ziggy as suffered the same fate as the other recent siblings. Although a picky eater Ziggy was active and eating until Monday. He stopped eating Monday, and began acting listless Tuesday. He passed away last night between 5-6pm EST. Water conditions = perfect Temp = perfect All other life forms in aquarium = fine, no signs of stress. Food offered: small hermit crabs with shells broken at both ends ( for easy access), live baby clams (shells intact and shells broken), disabled shrimp, undisabled shrimp, freshly killed baby guppy, a few pieces of brine. I examined the body with a lens. No parasites found, No cuts or odd markings. So that is what about 4 or 5 specimens that have suffered Sudden Infant Octopus Death Syndrome?I can not help but think there is some correlation. I am a fairly experienced marine/reef aquarist and I am not accustomed to failure and when I happens I have a hard time moving on without at least a hypothesis.