Was it an injury? I had a rooster rip off a point of a hen's comb. If not, then yes, it could be hereditary. It looks like a telescoped / inverted comb.
I don't breed seramas, but I've seen some English orps with poor combs. I culled this guy below because he had a bad back end of his comb. Instead of a single blade it had 3 points - like 2 symmetrical side sprigs. Although it looked interesting, we ate him before he could spread his genes. I think it's called a "carnation comb." It might skip generations but eventually come back, so I decided to sell his sisters as layers and never added any orps from his line.
As you can see, it wasn't an extreme case and the comb was otherwise straight. He was fine in many other ways, but I already had a wonderful rooster. His sisters became spoiled hens in a small suburban flock. For breeding purposes, you really want to select the best you can find, so you won't have to cull heavily in the future. If female, she'll still lay eggs for you to eat and make an interesting pet.
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