Do guppies commit suicide

The most common reason for guppies dying in your aquarium is the poor water quality. By feeding your fish you actually pollute the water in your tank. Guppies produce waste (they poop and pee), which is polluting the water. Over time the pollution can become so high, that the guppies will get intoxicated and will die. (source)
Temperature Shock If the temperature drops too quickly it can kill them straight away. Even if the drop stays within the temperature range they can normally survive in. A drop of 2-3°F in the temperature in a couple of hours is more than enough to kill a guppy or the whole school. (source)
If your guppy fish appears to be sleeping upside-down, it’s probably already dead or very close to dying. You can try to diagnose the problem (is it bad water conditions or a swim bladder malfunction?) and perform a major water change or administer medication to see if it helps. Feb 8, 2022 (source)
When a dog dies, their body may still show signs of what can look like life, such as the following: Twitching, as a result of natural nerve spasms after death. The release of air from the mouth when moved. The release of bodily fluids and gas. (source)
Overall stress will reduce the lifespan of your guppies and will eventually result in death. Here are the top factors that will cause guppy fish stress: low water temperature. small or overcrowded tank. Oct 9, 2021 (source)
https://www.youtube.com/watch?v=UpdkQriFhwI
Some fish succumb to pH shock immediately. Others may exhibit symptoms including thrashing, darting, gasping, swimming near the water’s surface and trying to jump out of the tank. Such symptoms are the same as those that indicate toxins in the water — either cause is serious. (source)
The most likely reason for your fish swimming upside down is a common ailment called “swim bladder disease.” If this fish is part of teaching your kids to be responsible with pets, bring them along. They will benefit massively from learning how to keep their heads clear and the treatment ready. (source)
If you notice your guppy swimming sideways or tipsy at the bottom of the tank, the organ that regulates their buoyancy, the swim bladder, may be damaged. As a result, guppies may have trouble staying afloat and sink to the bottom of the tank. Jan 9, 2022 (source)
It is not normal for guppies to lay on the bottom of the tank. In my experience, there are a number of reasons guppies lay on the bottom of the tank and these include illness, stress, and poor water quality. Pregnant females may also lay on the bottom of the tank prior to giving birth. (source)
Male guppies mature in 7 weeks or less. Total lifespan of guppies in the wild varies greatly, but it is typically around 2 years. (source)
No, guppies don’t need light at night. Guppies need darkness to sleep and rest properly. Having the aquarium lights on all the time may result in poor sleep quality, sickness, and eventually, death. Guppies need six to eight hours of sleep each day and thus, you should keep the lights off for the same amount of time. (source)
Most pets’ bodies are placed into cold storage while awaiting collection, as with people. This is usually a freezer facility, to stop any body decomposition. (source)
Open eyes at death may be interpreted as an indication that the deceased is fearful of the future, presumably because of past behaviors. (source)
A similar attitude toward the dead is not as clear in other species. In the early 1970s, anthropologist Ernest Becker wrote in his Pulitzer Prize–winning book Denial of Death that nonhuman animals know nothing about dying: “The knowledge of death is reflective and conceptual, and animals are spared it.” Nov 7, 2012 (source)