If u r reading this, I know what that is now.
You said "it's part of a fish".
It isn't really part of a fish, but is more like what makes fish in the future and isn't an egg, if you get my drift. Some call it "white children".
Another blogger says this of shirako "It was something like a high quality silky tofu. Yet, it has the umami that you would not find from tofu." I cannot disagree. However mrguy says: