Well my little guy is now just over 1 week old (since becomming free swimming). Hopefully we're past the stage where I'm most likely to lose him. I've gotta say I'm getting quite attached! And his siblings now have eyes (but they haven't yet migrated round to the sides of their heads or formed proper pupils). So fingers crossed both of them will make it to the free swimming stage. I'm hesitant about putting them together though. I hadn't realised (based on how small he still is!) just how much he's grown in the past week, but he's gotta have at least doubled in size.
Ps. Not sure it's a he, just seems to fit better than refering to it as an it.