Here’s frozen abalone, thawed out. You see a lot of grit here, so it needs to be scrubbed off with a bush. You can see this in my jeonbokjuk video.
Here’s the same abalone, scrubbed. See how clean it looks? Very fresh!
If your abalone is fresh, you probably don’t need to scrub it with a brush. Just use your hand to rinse it. You can even eat the intestines of fresh abalone! It’ll be delicious.