After the Inhumans were introduced in the pages of Fantastic Four, they didn't immediately get their own book. Instead, they began appearing in a series of backup stories in Thor. The series promised the origin of the Inhumans, showing things like the building of Attilan, discovery of the Terrigen Mists, what Black Bolt's power was, and more.
In Thor #150, Jack Kirby drew a story of Triton becoming the first to leave the Inhumans' island home for the first time in living memory, to find out if there were any other beings living on the planet alongside them. Well, what he found was a gross orange monster (not that one) attacking a woman:
We quickly find out that it was just a movie being filmed, but even with the color changed, there's no question who or what that sea creature is supposed to be.
