yorkshirehornet
Well-Known Member
Is it this one:
Pseudoliparis swirei
And it is the deepest fish ever caught. Scientists today formally documented the world's newest, deepest fish, Pseudoliparis swirei, an odd little snailfish caught at 7,966 meters in the Mariana Trench—
Pseudoliparis swirei
And it is the deepest fish ever caught. Scientists today formally documented the world's newest, deepest fish, Pseudoliparis swirei, an odd little snailfish caught at 7,966 meters in the Mariana Trench—

However - the one I am thinking of was used in Europe, despite being an import from the Ottoman empire. Next to Saffron they may even have been the most expensive plants ever in terms of weight. Another clue is that they are not edible.