Hoping to get an ID on this. Just noticed it this morning on the way out the door. It is growing out from under our door frame We were hit by hurricane Helene so there has been a ton of moisture lately. South Carolina USA. 
Discussion
Is it a fungus?
I don’t know anything, just asking questions
had a similar experience after cleaning a shelf once... bright orange mold came out of everywhere a few hours after the particle board got moistened