Being in this hobby for over 20 years (the last of which have been addicted to zoas & palys), I have gotten palytoxin poisoning a few times within the last few years. Well, just last week I was syphoning my tank during a water change and I found an aiptasia in one of my zoa colonies and I attempted to syphon it (useless attempt btw). The suction of the syphon obviously pulled some of the zoas into the clear tubing I was using and a milky white liquid rushed out. I thought maybe that was detritus that had accumulated, so I tried it again on another colony. Same thing. Turns out the white liquid was the toxin being syphoned out. Just an fyi, in case this happens to anyone, because the water you're syphoning may also be toxic to a certain degree.