If you’re getting dark spots you might want to see an opthamologist soon to make sure you don’t have a retinal detachment, which can be serious if not attended to Google retinal detachment symptoms and see whether it’s what you’re experiencing
No, they’re definitely actual “floaters”, i.e. material in the eyeball itself. Gosh though. I’ve had a number of opthamological episodes, attended to by high end professionals, but to paraphrase Walter Brennan in Northwest Passage, “Right now I can’t remember exactly what they was.”