Welcome to TONMO, the premier cephalopod interest community, and birthplace of #WorldOctopusDay and #CephalopodAwarenessDays. Founded in 2000, we are a large community of experts, hobbyists and enthusiasts, some of whom come together when we host our biennial conference. To join in on the fun, sign up. You can also become a Supporter for just $50/year to remove all ads and enjoy other perks. Follow us on Twitter for more cephy goodness.
The hardest thing? Probably learning to deal with the short life span...it can be difficult to deal with for some keepers. If you mean, what is the hardest physical thing, it would be maintaining correct water parameters...a lot of saltwater experience is a must to keep cephs...but once you do, you are hooked!!! Bimacs are great as captive octos, once you get the tank set up correctly...be sure to check out the ceph care check list !