Can vegans eat mushrooms?

Everything is an animal product by that standard because of the food chain.  Mushrooms are fungi of course, and when they're sessile they don't use up as much energy as most animals, so it's no bigger a problem than eating plants.  The real issue is whether they're conscious or can suffer, not how similar to animals they are.

you know mushrooms are not animals but are part of the fungi kingdom. From this point of view they are vegan, therefore, 100% vegan. However, some species of mushroom do capture and metabolize small animals, chiefly various species of nematode worms.

Like this any vegetation feeds off corpses.But in the process the energy they intake becomes that exact vegetable or fruit,not corpse any more!I am vegan myself and do eat mushrooms,they are definite vegetation even by taste!

Fungi resemble neither animals nor plants. They are a separate and fascinating species unto themselves. Like plants, they live off nutrients in the soil, including sometimes animal manure. As a vegan, if you cut out mushrooms, you will likely turn to tofu as a source. Tofu can provide too much estrogen, you're better off with 'shrooms.

All plant life and fungus feed off corpses.Think about it~ there is no soil on this planet that has not had a dead animal in it. Where is the point you are trying to make here?

You are right. I avoid mushrooms because they accumulate toxins.

I know you're trolling but the effect is spoiled by your ignorance. The term you want is by-product not “biproduct”. The prefix “bi”, which is what it would be here, signifies “two” as in biplane, bivalve, bilateral etc.

The vast majority of mushrooms are grown in huge greenhouses and are fertilized by a man made compost, that does Not include Corpses. 

Mushrooms feed off of corpses? Where did that nonsense come from? What about animal and poultry manure used as fertilisers? Apply your logic and you would likely starve to death.