Kaiju No. 8

Kaiju No. 8 is also listed as Kaijuu 8-gou on some trackers — same show, different title convention. It's a TV series across 12 episodes out of Production I.G. It's finished airing, so the whole thing is watchable start to finish.

Genre-wise it's tagged Action and Sci-Fi, which is the throughline if you're browsing by mood rather than by name. Liked it? The related picks below start with Attack on Titan, pulled from the same genre lane.