Whereabouts of the Grail

What are you doing here? Looking for 圣杯? I guess I got 圣杯 from bottom of the sea. A few days ago, I picked up a gold glass. It looked miraculous.

I can't give it to you if you need it. But would you do me a favor?

I explored the sea for a long time and my equipment is all broken. To fix it. I have to go to 水下世界 but don't have enough time. So I'm thinking of using a sturdy 鲨鱼假牙 to fix everything. Can you get 10 鲨鱼假牙 from 鲨鱼?

It was tough to pull it up. It's worth it.

Finally, you came back. Thank you. This is what I picked up from the sea. Is this what you're looking for?

Good. I don't know where you're going to use it. It's valuable. Please keep it safe!

Where is 10 鲨鱼假牙?