Interesting,I have seen shark cases for sale but I've neve tried them.Good thing you were able to remove the shark before it was finished off by the rays.
I would suggest listening to Matt and moving the embryo into something glass or plastic that is enclosed. I had an accident in the past where an egg case was opened too early and used a wine glass and fibreglass screen to secure the embryo successfully. A net is too rough and will likely tear the yoke sack, if it does it will be deadly. There is also too much space for the embryo to move around increasing risk of injury and likely burning energy needed for development. You are still looking at about a month before that embryo would be ready to hatch.
sharks for sale in holland? many species if you know?
what did you pay for it?
last time i was there they only had white or blacktips for 2000/2500 euro
or did you import the shark?
can buy them now in australia pretty cheap,
i was thinking my bro could send it when i'm setup in holland