Although I think such a goddess exists, my source for her existence heard it from somebody else who read it somewhere, and frankly, the name "Hit" doesn't sound remotely Melanesian to me. I think the name has evolved from the original source.
The legend that I was told:
This octopus goddess had a human son who lived in the Solomon chain (where Guadalcanal is). He wanted to marry a girl Mommy didn't approve of. As a result, she wasn't invited to the wedding ceremony. Just as the wedding was underway, she showed-up outside and put a spell over everybody with her writhing, erotic tentacle dance. This caused the wedding party to forget everything, join in the dance, and ultimately grab the nearest suitable person for purposes of crazed... well, you know. Needless to say, this ruined the wedding. Supposedly, rites were still being performed in some modified, more-symbolic fashion up until recently. I certainly hope this isn't some pagan-ceph urban legend. The whole embittered-goddess-not-invited-to-the-party-extracting-her-revenge thing seems fairly universal in terms of mythology; does any of that seem familiar to anybody? My searches have proven fruitless where this octo-gal is concerned, although thanks for tips on other Oceanic ceph-gods are in order. Help has been deeply appreciated.
Glubs and Squishes,