Shinryaku! Ika Musume

Japanese Title: 侵略！イカ娘

English Title: The Squid Girl: The Invader comes from the Bottom of the Sea!

Chinese Tutle: 侵略！花枝娘

First Season: Shinryaku! Ika Musume
Foolish land-born air breathers! Behold the terror from the depths, the tentacled conqueror of humanity: Squid Girl! With your pollution and stuff you really deserve it, so prepare for menacing, inky doom!

Squid Girl has come from the depths of the sea to conquer humanity for its pollution of the ocean. Within moments of arriving on the surface world, our easily distracted, little invertebrate is promptly bullied into working for the Aizawa sisters as a waitress, supplying their restaurant with squid ink. If poor Squid Girl can't handle two pushy Japanese girls, how will she ever subjugate the human race?

Second Season: Shinryaku!? Ika Musume
The nefarious Squid Girl is back to continue her self-appointed mission to invade the surface world. Or that's what she would do, if she could just stop getting distracted by squidding movies, reading squidly manga, and making friends as only a squid could make them. Squid Girl must overcome not only danger found at every turn, but her own squidly good nature as well.

OVAS: Shinryaku!! Ika Musume
Original anime DVD bundled with the 12th, 14th, and 17th volumes of the manga.