Arikia

Yes, that's it!! Thank you very much!!

I'm looking for a story about a merman crown prince who goes to land because there is a country that wants to trade the mermen's pearls (I think) for jewels. That country's prince demands to go to the sea because of this trade. I don't know precisely why. Since he can't breath underwater a young mage goes with him. The prince didn't know that the pearls come from the mermen and the jewels he trades (and a box of it for gift) are extramely rare and beautiful. I don't really remember more of it. I hope someone can help me. TIA!