The King Krab skin is an Rare Fortnite outfit. King Krab was available via the Item Shop for 1200 V-Bucks and you can buy it from Fortnite Item Shop when it will listed.
Fortnite King Krab Skin Details
Behold my luminous krabulosity! Glow style glows at night
Fortnite King Krab Skin PNG Images
Here is the PNG images of King Krab below!