Deviate Fish

About 3s 84c on Beta · Alliance (10 hours ago) and 84c on Beta · Horde (10 hours ago), from player scans. A vendor pays 4c, so the auction house pays 91.2× more.

2 recipes: Elixir of Giant Growth and Savory Deviate Delight.

No. It is in Classic Era too, with the same item level, vendor price and stack size.

Sell it on the auction house. After the 5% cut a stack of 20 brings about 72s 96c there, against 80c at a vendor.