is demon slayer: kimetsu no yaiba episode 53 filler?

Amidst their intense battle, Gyokko becomes enraged after hearing Muichiro insult his vase and unleashes a flurry of vigorous attacks. Without even flinching, Muichiro fools him and once again aims to strike his neck, but Gyokko gets out of his vase and transforms into his true form.

With fists that transform anything it touches into fish, Gyokko can now move even faster than before...