Unfortunately, the answer is yes. Though the lifespan of these fish usually reaches two years, there are a lot of factors that can cause their death. For one, they can die when their own waste is not filtered out of the water. They can also die when the water in their habitat is too cold or too warm. A high level of ammonia in the water can also kill a guppy.
So, if you want to own a few guppies as pets, it’s important to set up and maintain the proper aquarium habitat to keep them happy and healthy!