What is hanging off of my guppy

Camallanus is one of the most commonly found parasites in guppies. This parasite can reach up to 0.8 inches in length and is sticking out from the anus of the fish. It is easy to distinguish from wish waste because the Camallanus has a brown or orange color and has a movement similar to worms. (source)
Constipation in fish is typically revealed by bloating and the production of stringy feces. Normal fish feces will immediately fall to the substrate; constipated fish feces will appear stringy and hang from the fish. Jan 1, 2014 (source)
Affected fish are usually (but not always) covered with white spot-like cysts on their flanks and fins, and also exhibit such symptoms as heavy breathing, lethargy and clamped fins. (source)
Internal parasites are probably the most likely cause of stringy white poop in guppies. Guppies are true scavengers. They will eat anything and everything. Guppies can often be seen eating from the bottom of the aquarium and typically this is where they consume either the parasites themselves or their eggs. (source)
https://www.youtube.com/watch?v=dg1PV6zzTu4
Mycobacterium spp. can infect mammals, birds, reptiles and fish. Some species will cause a localized infection, while others a full-body, systemic disease. This disease is called “fish tuberculosis” since Mycobacterium tuberculosis is the causative agent for tuberculosis in humans. Oct 20, 2021 (source)
Look to see if your fish has cloudy eyes, white patches or is gasping for air, rubbing on objects and is listless. Fish lice could cause these symptoms. Internal parasites will cause loss of appetite, listlessness and erratic swimming. Note redness, irritation and/or threadlike worms coming from the fish’s tail area. (source)
They resemble a threadlike worm poking out of the fish’s skin, eyes or gills. If you can get a really close look, their bodies are forked, making them look like an uppercase “Y”. Anchor worms burrow their heads into the fish’s flesh, usually in between scales, and the body trails out after it. Jun 22, 2021 (source)
As your female fish becomes pregnant, she will grow a bulge at the back of her abdomen. This typically appears over the course of 20-40 days. Does your fish have a red or black spot? Sometimes, when a female fish is pregnant, she will develop a “gravid spot” on the abdomen. Jul 27, 2017 (source)
Symptoms. Most columnaris infections are external and present first as white or grayish spots or patches on the head and around the fins or gills. The lesions may first be seen only as a paler area that lacks the normal shiny appearance of the rest of the fish. Mar 23, 2022 (source)
Ich, also known as white spot disease, is caused by the parasite, Ichthyophthirius multifiliis. Ich is usually visible as a small, white spot on your fish’s skin. The ich parasite penetrates the skin or gills, burrows under the surface, and eats at the fish’s flesh. Ich has a high mortality rate and is very infectious. May 5, 2022 (source)
https://www.youtube.com/watch?v=Ok7RxLkWJQ0
Usually, what causes white mold is poor water conditions, overfeeding your fish, fish waste, or even wood decorations. You can easily prevent white mold if you don’t overfeed your fish, keep your tank clean and with regulated water conditions, and quarantine any decorations before you add them to your aquarium. Nov 22, 2021 (source)
This means it is completely normal sometimes to see your fish pooping long strings. It just means that the fish hasn’t eaten food in a while and is hungry. You shouldn’t ignore this sign and feed the fish as soon as possible, but it doesn’t mean that your fish has some serious disease. Mar 3, 2022 (source)
https://www.youtube.com/watch?v=jDRueALX0Vc