Olgoi-Khorkhoi, Found it! New Legendary fish you need 3 of for Halycon Rod Supra

[Unmitigated]

For the life of me I've been trying for days to catch the Olgoi and still no luck, 368 gathering and 300 perception- I did a few HQ Magic Carpets though. Using sand leech in heatwave weather and nothing up to this point.