Manga oleh Masahiro Anbe itu dibuat serial di ''Weekly Shonen Champion'' Akita Shoten antara Juli 2007<ref>{{Cite web|url=http://www.akitashoten.co.jp/w-champion/2007/35|title=週刊少年チャンピオン 2007年No.35|publisher=[[Akita Shoten]]|language=ja|access-date=March 9, 2016}}</ref> dan Februari 2016.<ref name="mangaend">{{Cite web|url=http://www.animenewsnetwork.com/news/2016-02-17/squid-girl-shinryaku-ika-musume-manga-ends-on-february-25/.98727|title=Squid Girl/Shinryaku! Ika Musume Manga Ends on February 25|date=February 17, 2016|publisher=[[Anime News Network]]|access-date=February 17, 2016}}</ref><ref>{{Cite web|url=http://www.akitashoten.co.jp/w-champion/2016/13|title=週刊少年チャンピオン 2016年No.13|publisher=[[Akita Shoten]]|language=ja|access-date=March 9, 2016}}</ref> Serial ini disusun menjadi 22 volume ''[[tankōbon]]'' dan dirilis antara bulan 7 Maret 2008 dan 15 Mei 2016.<ref>{{Cite web|url=https://www.amazon.co.jp/dp/4253214010|publisher=[[Amazon.co.jp]]|language=ja|script-title=ja:侵略! イカ娘(1) (少年チャンピオン・コミックス)|access-date=June 15, 2014}}</ref><ref>{{Cite web|url=https://www.amazon.co.jp/dp/4253225705|publisher=[[Amazon.co.jp]]|language=ja|script-title=ja:侵略! イカ娘(20) (少年チャンピオン・コミックス)|access-date=January 3, 2016}}</ref><ref>{{Cite web|url=http://www.animenewsnetwork.com/news/2016-01-08/squid-girl-shinryaku-ika-musume-manga-22nd-volume-will-be-last/.97341|title=Squid Girl/Shinryaku! Ika Musume Manga's 22nd Volume Will Be Last|date=January 8, 2016|publisher=[[Anime News Network]]|access-date=January 8, 2016}}</ref> Manga ini diterbitkan di [[Republik Tiongkok|Taiwan]] oleh Chingwin Publishing Group.<ref>{{Cite web|url=http://www.ching-win.com.tw/?sinfo=detail&b_unit=1473|publisher=[[Chingwin Publishing Group]]|language=zh|script-title=zh:侵略！花枝娘 01|access-date=October 4, 2013}}</ref><ref>{{Cite web|url=http://www.ching-win.com.tw/?sinfo=detail&b_unit=6985&template=comic|publisher=[[Chingwin Publishing Group]]|language=zh|script-title=zh:侵略！花枝娘 15|access-date=June 15, 2014}}</ref>
