It would entirely depend on the species of Nematode you're talking about. If you are referring to species that are used in lawn care, they have been tested and are completely safe.
Humans mainly harm them, they are hunted for their fat, and they are often eaten in some countries, countries like japan.
nematodes are worms and they are extremely important to humans because they are major decomposers which is important to break down dead organisms and material to put the nutrients back into the ground.
Nematodes, or roundworms, are a diverse group of organisms, and their impact on humans and the environment varies widely. While most nematodes are harmless or even beneficial, some species can be pathogenic to plants, animals, and humans. For example, certain parasitic nematodes can cause diseases in livestock and crops, while a few can infect humans, leading to health issues. Overall, their danger largely depends on the specific species and context.
pigs will harm humans when they do not feel right if it thinks your going to harm it then it will harm you
Cows are eaten by humans.
it is eaten raw by humans
No commercial tulip petals can not be eaten by humans.
In defense, if a poison dart frog is eaten, it will harm whatever ate it.
Crocodiles don't eat frogs because of an acid frogs have that can harm crocodiles if eaten. The acid doesn't effect humans however.
in ancient Egypt they were fattened and eaten
Crustaceans are eaten by humans.
Polymers can release reactants that are harmful to humans. Not only can they harm humans, but they can harm the environment as well.