Check out 2 minutes into this video. This is a bluegill, but I am pretty sure crappie have, perch definitely do. I think most fish have? I know walleye, trout, bluefish, redfish, croaker, black drum, pompano, striped bass, ect. all have. Definitely different than pike, which I have only filleted maybe 5 in my life, and mostly butchered. Definitely using the wrong terminology in "Y" bone above. With crappie, their rib bones go so close to the skin, I usually have a hard time to get a good rib section of meat without messing it up. It is usually at the point where most fish's "pin bones" are, where I have difficulty on crappie. I wasn't sure if their bones are thicker causing the issue, but I think it is more the ribs running so close to the skin.
When I fillet just about any fish, I will do similar to this video. Run a cut through the back along the spine about 1/4" in, just to cut the skin first. Then work the knife along the back, until it hits the rib cage, then work the knife around the rib cage. Right at the lateral line, there is a series of bones that I cut through, then follow along the rib cage to grab that meat. Once I have the fillet off, I rub my finger along that line to find them, and make a cut on the top and bottom of those bones and take them out. Just about every crappie fillet video that I have watched, guys don't save that meat. It is paper thin, but when fried is like chicken skin, and probably horrible for you, but delicious...
When cleaning a mess of fish, I break out my electric knife and just cut right down along the spine and through the rib cage. Then cut around disregard the rib meat (which has these pin bones in), and takes 1/3 of the time.
https://www.youtube.com/watch?v=Itbh_H-NtU0