OMG!! You were attacked by the swamp monster. I might have thought a creature from the abyss but a swamp monster seemed more fitting for that grossness floating up to your face. I’ve wondered how sanitary baths at the spa are. Question answered. You would have been better off in a mud bath, at least you expect to be dirty and gross.
I know! I would much rather it had been a fiend!
It was quite gross. I suspect the fancy ones I had seen when I googled it might empty and refill in between each one but this was yuk!