What are some examples of organisms in the phylum nematoda?

Toxocara canis – the one that puppies are “wormed” to remove and that can cause blindness in children if they come into contact with animal faeces and are infected.
Vinegar eels – tiny free living worms that can live in vinegar or liquids that can become vinegary such as cider, wine, beer etc.
Caenorhabditis elegans – a 1mm long free living nematode that has been used for many years (starting in 1974) as a “model organism” for scientific research. At maturity all individuals have exactly 959 cells. It was the first multicellular organism to have its complete genome sequenced (in 1998), so leading ultimately to the “Human Genome Project.”