are of fuzzy white yeast, any of them look familiar?
Most of
these ones are of fuzzy white mold. Notice that usually there are also brown or green or black colors as well and they're generally much fuzzier.
Side note, we used to live in Seattle, which is fairly humid. Once we were helping a friend renovate a house. We found some black-colored mold in the bathroom and immediately thought it was the famous toxic "black mold". We hired one of the top plumbing companies in Seattle to come in and look at it (we also need some drain repairs) and he said in his 30 years of experience in Seattle he has only seen the toxic black mold a couple times and this was not it. He said that as obvious as the extent of the mold was, if it was black mold, we all would have been very sick by now. Not that breathing mold spores of any kind is generally a good idea, but this wasn't the really bad stuff. He said the toxic stuff was not common in Seattle because it wasn't warm enough for it to really thrive, like it is in a humid/hot climate like the Southern US.