"These veligers free swim, or float, for 3-4 weeks while trying to find suitable substrate to attach to."
No new info but for me my main concern now is giving my boat its greatest chance while it now sits in my driveway after a Powell trip and not being deconed. The above sentence gives credence to the concern of standing water and dry times (I know, duh), but if I can make sure there isn't standing water in the engine or anywhere else in the boat I can find my sanity again. I was honestly contemplating boiling a huge pot of water and pouring it into the intake and overflow hoses of our livewell, but then what if that somehow left standing water?
The whole situation sucks, but I think I can sleep at night if my boat is dry. I guess actually seeing them in person now brings a whole new reality to it.