Timothy Collinson wrote:

>     ... I learned that an octopus absorbs oxygen through its skin as well as gills.

Ditto many (? - perhaps all) insects. Take a look at
https://en.wikipedia.org/wiki/Respiratory_system_of_insects

I think I read somewhere that insect respiration is much more efficient than
animal, but I can't find a good source for that so it may not be true. Anyone?

>     Also, PLEASE can some one get octopuses out of my head?

Hope that helped! :-) No? How about near-C insects in sensible shoes :-)

Jonathan