I'm a little surprised by the striking similarities between Octocat and the "Octonauts" (www.octonauts.com) - a cartoon in the UK that my two kids are mad about.
I'm trusting that these copyright/design right concerns have been contemplated at least - not least because of the similarity in name as well as in design.
(See the google images link for a collection of octonauts: http://goo.gl/Xek21)