They say that if the inverted scale on a dragon's chin is touched, it goes mad with rage. This legend created the idiom "touch the inverted scale" (逆鱗に触れる, gekirin ni fureru), meaning to incur imperial wrath or to anger one's superior.

Let's test that with you, Iku!

Now just a minute!

I am no dragon!

I know that.

When you catch a dragon-fish by its chin... Strictly speaking, 龍魚 refers to the Asian arowana (Scleropages formosus), but that's not how it's meant here.

D-...don't! If you... do that to me, I...

Hmm? But you're not a dragon, so you should be fine, right?

Ah, ahh...

.... On this day...

...for some reason, lightning struck at random on the surface...

...the story goes.