Texture/Model Help

I need help trying to create this sort of texture/pattern on my model. Like something you can run your hands on that makes a certain sound, like as a kid when you run the stick alongside some barriers, that type of feeling but with the fingers and soft. Think of these lines on the SP3, but I would want them closer together and a bit wider so the inside of the sink is hidden, only visible through small slits. Something like this fish gill. It should be one long slender shape that continues along the edge, but I am struggling with figuring out how to go about it. Thank you for your help!