I am a research technician looking into an octopus for a project. Before anyone gets all crazy activist on me, the research done is measuring a stress hormone in the feces. No harm will ever come to the octopus to do this research. In fact most of the time it will do nothing more than sit around an be pretty. I have been looking into the subject for my boss, a research doctor, to see if the venture will be acheivable in any way. We already have a tank set up. It has been set up for several months and has no other marine life (save algae) in it. what I need to find out is how much feces does an octopus produce. I understand they produce a lot of waist but waist does not mean feces. Can anyone describe to me what octupus feces is like? There is no imminence in this, we have yet to even pick a species though we are leaning toward either a bimac or a day octopus right now. We are pretty much just looking for one that meats our needs. Any help or info would be appreciated. We do have protein skimmers and canister filters available that can be used. We also have an exotics vet that checks our lab once a month to make sure everything is going as should be.