I found this on WetWeb: http://www.wetwebmedia.com/sharkeggfaqs.htm

Feeding a newly hatched bamboo shark - 4/14/05
Hello.
<Good morning>
I know that there has been others asking questions on feeding new born Bamboo sharks.
<Oh yes.>
Mine just hatched one week ago and has not eaten.
<Not unheard of at all can take up to a few weeks and sometimes a few days. Remember they feed on the yolk until hatching.>
The store where I got the shark egg from says that the shark should be eating right away and if it does not eat soon that it will die.
<If sharks don't eat they will die, but remember, as I said before, they do feed from the yolk until hatching and in some cases it may take a while for the shark to build appetite.>
From some of your other questions answered you stated that you should not feed the new born for three weeks.
<Oh no, it can take a newly hatched pup three weeks to eat but you should offer food every day. The question here is what foods are you offering? It is well documented what to feed them but I would try pieces of human quality prawns, krill pieces, smelts, anchovies, squid. Try various small pieces of fresh human quality marine foods.>
I am just confused with what I have heard and what is on this site.
<Understandable.>
Do you know for sure that I should wait for three weeks before feeding it?
<I would not. Offer suitable food choices everyday.>
I just don't want to starve it for 3 weeks and risk it dieing if this is not what I was suppose to do.
<Agreed. Thanks for being part of it all! ~Paul>