Nematodes are found in a wide variety of habitats. Some are free-living, while others are parasitic. Free-living nematodes are found in soil, water, and even the air. They play an important role in the decomposition of organic matter and the cycling of nutrients. Parasitic nematodes live in or on other organisms, and they can cause a variety of diseases in humans, animals, and plants. Nematodes are important in a variety of ways. They are used as model organisms in research, and they are also used in biocontrol, which is the use of living organisms to control pests. Nematodes are also used in aquaculture, which is the farming of fish and other aquatic organisms. Here are some of the most common types of nematodes: ☑️ Plant-parasitic nematodes: These nematodes feed on plants and can cause a variety of diseases, such as root-knot nematodes and cyst nematodes. ☑️ Animal-parasitic nematodes: These nematodes feed on animals and can cause a variety of diseases, such as roundworms, hookworm...