Mermaid's Brew requires 6 orange shells. It's listed correctly in several places in the Hub, but in others it's listed as orange coral. I wish! It's really hard to get Orange Shells.
What Storms May Come part 3 Goal 1
https://forums.storm8.com/showthread...=1#post1431415
And in the Inventory Guide, a little section called "Mermaid crafts" (right after the "Mermaid Bracelet")
Thanks for keeping up the Hub - it's invaluable!