
Mushrooms are a type of fungus, and like all organic matter, they will eventually start to break down. This decomposition is carried out by microorganisms, including mould. Mould is a type of fungus, but it is not the same species as mushrooms, and therefore mould growing on mushrooms cannot be considered cannibalism. However, it is important to note that mouldy mushrooms should not be consumed, as they can cause allergic reactions and respiratory problems.
| Characteristics | Values |
|---|---|
| Whether mold on mushrooms is cannibalism | No, as mushrooms and molds are different species. This would be akin to humans eating cows. |
| How to identify mold on mushrooms | Mold is typically green and has a terrible smell. |
| Edibility of moldy mushrooms | Moldy mushrooms should be discarded as they can cause allergic reactions and respiratory problems. |
| How to prevent mushrooms from molding | Store mushrooms in a brown paper bag in the fridge. |
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What You'll Learn

Mushrooms and mould are different species, akin to humans and cows
While it may seem like cannibalism when mould grows on mushrooms, this is not the case. Mould and mushrooms are entirely different species, and their relationship is more akin to that of humans and cows. Just as humans and cows are both mammals, mould and mushrooms are both types of fungi. However, they belong to distinct phyla, which means they are fundamentally different from each other.
Mould is a microscopic type of fungus that can grow on various substances, including mushrooms. It is important to distinguish between mould and mushrooms, especially when it comes to consumption. Mouldy mushrooms should be discarded as they can cause allergic reactions and respiratory problems. However, it is worth noting that not all white fuzz on mushrooms is mould. Sometimes, it is the mushroom's mycelium, which is harmless and does not affect the taste.
Mycelium is the vegetative part of a mushroom, responsible for nutrient absorption and reproduction. It can appear as white fuzz on mushroom stems or caps, especially on certain varieties like chestnut or oyster mushrooms. Mycelium can be safely consumed and it is not considered mould. However, if the mushroom is slimy or smells bad, it has likely gone bad and should be discarded.
The confusion between mould and mycelium is understandable, as they can both appear as fuzzy growths on mushrooms. However, mould is a contaminant, while mycelium is a natural part of the mushroom's life cycle. Mould typically indicates decay, whereas mycelium can even be cultivated to produce more mushrooms under the right conditions.
In conclusion, while the growth of mould on mushrooms may evoke thoughts of cannibalism, it is not an accurate comparison. Mould and mushrooms are different species within the broader category of fungi, much like how humans and cows are different species within the mammal category. Understanding the distinction between mould and mycelium is essential for both culinary and educational purposes.
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Mould on mushrooms is not cannibalism, it's natural
It is important to differentiate between mould and mycelium, the original organism that produced the mushrooms. Mycelium can sometimes resemble mould, but it is harmless and will not affect the taste of the mushrooms. Mycelium is often found in the caps or spores of store-bought mushrooms, as it continues to search for food to fruit additional mushrooms. Chestnut and oyster mushrooms, for example, frequently exhibit mycelium growth on their stems.
White fuzz on mushrooms is typically mycelium rather than mould. It is a natural occurrence, particularly when mushrooms are freshly picked and exposed to temperature changes during transport and storage. This temperature variation can stress the mushrooms, causing them to release their mycelium, which quickly forms a fuzzy coating. While it may not be aesthetically pleasing, this white fuzz is safe to consume and does not indicate mould growth.
However, it is crucial to exercise caution when consuming mushrooms. Mouldy mushrooms should be discarded, especially if they exhibit sliminess or a strong odour, as these are signs of spoilage. Mould can produce toxins that are harmful, especially for individuals with mould allergies or respiratory issues. Therefore, it is recommended to inspect mushrooms closely and err on the side of caution if there is any doubt about their freshness or the presence of mould.
In summary, the growth of mould on mushrooms is not an act of cannibalism but rather a natural occurrence in certain conditions. It is important to distinguish between mould and mycelium, as the latter is harmless and common in freshly picked mushrooms. However, mouldy mushrooms should be discarded to prevent potential health risks associated with mould toxins.
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Mould is microscopic fungi, distinct from mushrooms
Mould and mushrooms are both types of fungi. Fungi are eukaryotic microorganisms, which can occur as yeasts, moulds, or a combination of both. Fungi can be unicellular or multicellular, and some are large and conspicuous, while others are microscopic.
Moulds are considered microbes and are distinct from mushrooms in that they occur in long filaments known as hyphae, which grow by apical extension. They derive energy from the organic matter on which they live, rather than through photosynthesis. Moulds are also known to cause biodegradation of natural materials, which can be unwanted when it results in food spoilage or damage to property. They play an important role in biotechnology and food science, contributing to the production of various pigments, foods, beverages, antibiotics, pharmaceuticals, and enzymes.
Mushrooms, on the other hand, are the macroscopic fruiting bodies of fungi. They are pros at colonizing and spreading, even if it means breaking down their own fruiting tissue. Some mushrooms are edible, while others are toxic.
While mould and mushrooms are both fungi, they are different types and belong to distinct classifications. Therefore, when mould grows on mushrooms, it is not an instance of cannibalism, but rather analogous to a wolf eating a dog.
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Mould is toxic, but mycelium is harmless
Mould and mushrooms belong to different phyla, so eating a mushroom with mould on it is not cannibalism. It is more akin to humans eating cows; both are mammals, but it is not considered cannibalism.
Mould can be toxic to humans, especially black mould. Black mould exposure can cause an allergic reaction, especially in those with weakened immune systems. It can also cause or worsen asthma symptoms. The most common symptoms of black mould exposure include sneezing, coughing, congestion, eye irritation, shortness of breath, and chest tightness.
Mould can also produce mycotoxins, which are toxic substances. However, not all moulds produce mycotoxins, and even those that do may not produce them in all environmental conditions. Furthermore, a person may not inhale mycotoxins upon exposure to a mould that produces them. While mould poisoning (mycotoxicosis) is possible, there is no conclusive evidence that inhaling or touching mould can cause it.
On the other hand, mycelium, the root-like structure of fungi, is generally harmless to humans. It can even be beneficial for human consumption and is used in food production and supplements. Mycelium has been shown to have potential health benefits, such as boosting immunity, supporting heart health, and providing anti-aging effects. It is important to note that some mushrooms that grow from mycelium may be toxic if eaten, so proper identification is crucial.
In summary, while mould can be toxic, mycelium is typically harmless and can even offer health benefits when consumed. Therefore, it is essential to distinguish between mould and mycelium when dealing with mushrooms, as consuming mouldy mushrooms can have adverse health effects.
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Mould is green, mycelium is white
The colour of the substance growing on your mushrooms is an important indicator of what it is and whether it is safe to eat. If you see white fuzz on your mushrooms, it is likely mycelium, whereas if it is green, it is probably mould.
Mycelium is a part of the mushroom organism and is completely harmless to consume. Mushrooms are pros at colonising and spreading, even if it means breaking down their own fruiting tissue, so it is very common to see mycelium on mushrooms. Mycelium can be found in the caps or spores of many store-bought mushrooms, as they are expanding to fruit mushrooms again.
Mould, on the other hand, is a microscopic fungus, but it is very different from the mushrooms we eat. Mould can cause allergic reactions and respiratory problems, so it is important to be able to distinguish it from mycelium. Mould will also have an unpleasant odour, which will be noticeable.
To prevent mushrooms from moulding, it is recommended to store them in a brown paper bag in the fridge. This will help to keep them dry, as mushrooms will start to mould if stored in a moist environment.
It is important to note that mouldy mushrooms should not be consumed, as they can cause serious health issues. While mushroom mycelium may look similar to mould, it is safe to eat and will not affect the taste of your dish.
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Frequently asked questions
No, it is not cannibalism. Mushrooms are a type of fungus, whereas mold is a different species of microscopic fungi. This would be similar to humans eating cows—both are mammals, but it is not considered cannibalism.
If it is white, it is likely mycelium. If it is green, it is mold. Mold will also have a terrible smell, so you will likely know if it is mold. Mycelium is harmless and will not affect the taste of your mushroom dish.
Moldy mushrooms should be discarded. Mold can cause allergic reactions and respiratory problems, especially for those with a diagnosed mold allergy or respiratory issues.
Mushrooms will eventually get moldy, especially if stored in a moist environment. Mushrooms are pros at colonizing and spreading, even if it means breaking down their own fruiting tissue.

























