Gives girls 8 tentacles or so. This version is somewhat flexible but generally supports only a few poses. It does support a few tentacle colors: red, orange, and purple. You may need to do a bit of cherry picking or up the weights to get good results.
To use, a lyco weight of 1-1.3 worked well for me, along with the terms 0ct0pus, octopus woman (or octopus girl). I then upscaled with img2img at the same weights.
Models
As of writing this, I was only able to get this working well with a few models, and NSFW is very iffy but will probably start to work once better models come out. Here's the ones I found work decently:
Realistic - SpectrumBlendX
Semi-Realistic - Dynavision XL
Anime - Explicit Freedom NSFW
I've been having fun results with a 70-30 mix of spectrum and dyna, and also a 25-25-50 of dyna-spectrum-explicit. Let me know if you find any good models and/or any way to improve NSFW results