Algae eaters are omnivores, and although their diet primarily consists of algae, when other food sources become scarce, they will feed on dead fish and other organic matter. They are known to be opportunistic scavengers, and when an algae eater detects the presence of decaying fish in their environment, they will take advantage of it.
It's important to note that while algae eaters may occasionally feed on dead fish, it is not their preferred food source and should not be relied on as a primary food source. A balanced diet consisting of algae, vegetables, and other appropriate foods is necessary to ensure the health and well-being of algae eaters in captivity.