It's not super well kept, but if you want to play with the tentacle nodes, here it is! I'll make a more presentable tentacle model file in the future, but for now, this'll do ^^
So one note I'll say, the resolution isn't automatic fully, so once you have the length made, adjust the resolution until the crease wrinkles start to show. I think I can get it automatic to sample the curve length and write some math to change on length, but haven't gotten around to doing that yet.