sorry if i wasn't supposed to bump this topic. (some forums have rules against bumping topics more than a week old.) i spotted some ceph refrences in my (translated) ranma 1/2 mangas.
if you don't understand the story, i suggest reading
this. it should give you a basic idea.
obligatory censorship warning: please note that ranma 1/2 is rated T+ (for older teens). the manga and anime themselves contain nudity and mild alcohol/drug use, but i *think* you should be okay with that site. and no, it's not tentacle hentai.
and now, on with the refrences...
-a female octopus becomes smitten with happosai (one of the characters) at the end of the "love pill" story. (don't ask)
-in the "hinako intro" story, hinako-sensei (another character) is spotted eating tako-yaki, in front of a cart that says "osaka style takoyaki". as a side note, said cart has a cute octo logo.
-there is a short storyline revolving around a rogue octopus pot. (again, it might be better not to ask...)
-there is a spring-of-drowned-octopus in jusenkyo. taro (another character) uses it to add tentacles to his already-motley cursed form.
wish i could provide scans, but i don't understand my scanner at all.