Hello. Yesterday, I saw that one of my guppies, Tobias, had something big sticking out of him. Here's a pic: It's a little hard to see the redness in the pic, but he has gills that are a little redder than normal and a thin line of redness next to the thing sticking out. Also, two days ago, I posted here saying he had something sticking out of his butt, but the general way of thinking was that it was just poop. But the next day, a little bit of that was still there. I tried asking for help in the Freshwater Fish Diseases Forum in that same thread after I saw the new thing sticking out and no one responded. My questions: Is this a parasite for sure? If so, which type? I'm not even sure if it's partially internal or completely external. How do I medicate him and my other fish so he gets cured and the others don't get parasites or they get cured if they already have them? Is he probably going to die from this? Are my other fish probably going to die from this? Going to check on them for the first time today. Praying that I don't find any dead fish or more things sticking out of anybody.