So far, I don't think we have come up with a knowledgable formula for how to feed an octopus. The amount of food seems to vary widely from octopus to octopus (even within the same species). Both my briareus (together) do not eat as much as Legs. My first male hummelincki ate twice what any of the others wanted, Puddles (dwarf sized macropus) only wants food every other day but Sleazy (merc) is usually hungry 6 days a week. Roy had a very long lived bimac that was fed sparingly (more food every couple of days) and he notes that feeding this way may have been the reason it lived for almost 3 years.