Nigod jiv (Nigod/nigoda) is the lowest form of living beings in Jain cosmology. They are extremely tiny, often described as many souls sharing a common body (samyoga sharira), and they have very little consciousness—usually said to possess only one sense (touch). They exist in vast numbers and their karma-bound condition means they have little hope of rapid spiritual progress. There are mentions of two types in some texts: nitya-nigod (always in nigod) and itara-nigod (souls that have fallen into nigod from higher lives). You can read more here