Hey what you want to do is try to feed the bamboo mysis shrimp. Make sure you feed him a little bit once a day and don't add garlic that dosent work with sharks.
Just wanted to add a new picture. This is him as of today. Still not wanting to eat, but he's coming out of his cave and swimming around and being more active then he was before. Still concerned about him not eating though, but it's only been 9 days.
at nine days, i would start offering food daily. try right after the lights go out. use oily fish or "smelly" shellfish. i have never had a healthy pup refuse squid.