You don't smell the slightly fishy odor from the natural sepia ink on the internet.
Sepia being composed mostly of mollusc melanin, has the same color as the principal human skin brown pigment.
Authentic sepia ink is prepared from the dried ink sacs of the common cuttlefish, Sepia officinalis. Being a naturally derived organic colorants, the pigment is usually considered as not lightfast. But that's proved wrong as shown in these tests. Good scientists need to be able to recognize imminent paradigm shifts and pigment smears and adjust hypotheses accordingly.
Anything but sluggish, cuttlefish are the action painting metaphors that art needed. Deeply buried squid ink on paper bolstered by practices that integrate art with humor, have risen to the surface.
I would only worry deeply if I was a mollusk.