Detntivore is not a word. Do you mean Detritivore? If so the definition is as follows: Detritivores, also known as detritus feeders or saprophages, are heterotrophs that obtain nutrients by consuming detritus (decomposing organic matter).[1] By doing so, they contribute to decomposition and the nutrient cycles.
They are like worms, fiddler crabs & slugs.