Vandecaria
Neukadian trait which makes digestion less efficient, but allows fresh ink and flesh to be safely consumed.
Colloquially and half-rightfully called vampirism, Vandecaria allows one to feed from ink-based life rather than proper food.
Failing to do so may lead to weakness and frailty, as the body will fail to absorb all the nutrients of non-ink food. On the other end of the spectrum, overconsumption may affect one's ink color, causing it to gradate or outright be replaced by the color most eaten.
For liquid ink, it is no longer edible after exposure to air. This makes it difficult to collect and preserve for later. Flesh, however...
This trait's name is compounded from "vandellia", "candiru", and "carence".
Vandellia is a genus of catfishes native to South America. The species in this genus are the most well-known of the parasitic catfishes also known as candiru.
carence f (plural carences)