i tried litteraly everywhere, i spent 3 hours trying to get it, the only place i found one is here

Pode ser pescado na Ilha do Olho de Okilua
https://prntscr.com/sf2h2w

I got this fish in Juur Sea
Also I recommend that you use +10 Maple Float and +10 Mediah Fishing Rod, they both increases your "Chance to catch Rare fish +5%"

Fiquei 1 dia afk nos outros spots ao redor e nada.

Únic lugar que encontrei... De nada

Demorei muito pra conseguir pescar esse peixe e depois de várias horas eu consegui nesse local.
https://imgur.com/uqruPD4
https://imgur.com/IXuB9dE

"All Rare quality species caught in the Margoria ocean are now in one shared group, meaning they can be caught in any of the Margoria sea areas including Ross Sea, Juur Sea and Vadabin Sea. Given the large number of species in this group they are listed below and referenced in the list."

https://community.blackdesertonline.com/index.php?threads/fishing-bdo-seawater-fishing-guide-updated-for-10-october-2018-changes.319970/

You can get this fish from Candidum spot.

Словила на удочку на Око Окиллу.

Top comment has screenshot to Nada Island, but I think this island doesn't exist anymore because I wasn't able to find it.

Got mine on Oquilla's eye on the same spot as Xenogames comment.

[Magoria] Vadabin - (For Besoin de poisson, couic !) -

https://ibb.co/m8fnkX7
mobio