A HUMAN NECESSITIES
A01 AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
A01K ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
2227/00 Animals characterised by species
A01K2227/70 Invertebrates
A01K2227/703 Worms, e.g. Caenorhabdities elegans