Season 1 · 12 episodes
Angered by the pollution in the seas, a squid girl named Ika Musume comes from the sea and declares the invasion of Earth at a nearby yakisoba stand, but isn’t taken seriously due to her small stature. When she goes to plead her case, she …
Ika meets lifesaver, Gorō Arashiyama, though gets annoyed when he doesn’t live up to her definition of "protector of the sea." Ika tries to drown him to show him up, but this in turn prevents him from reaching a kid trapped in a current, s…
The gang take Ika, who had never heard of ghosts before, on a test of courage at the local cemetery, but she just ends up scaring everyone with her ability to emit light. Later, Ika becomes frightened when inflatable killer whales start sh…
When Ika finds a lost wallet, the owner rewards her with 10,000 yen, which she spends on frozen shrimp. When the TV in the beach house breaks down, Ika is invited to sleep over at the Aizawa household. While exploring the beach, Ika and Ei…
A woman named Cindy Campbell who comes from a US extraterrestrial research laboratory believes Ika to be an alien and wants to take her back to her lab. Cindy attempts to brainwash Ika into thinking she’s an alien, but her appetite snaps h…
A hero show is performed on the beach for the kids, though the performers run into a bit of trouble when Ika somehow manages to get everyone to cheer for the villain. When Ika then takes the costume for herself, Chizuru acts as a guest cha…
Concerned about any evil plans Ika may have, Nagisa decides to sleep over at the Aizawas to keep watch on her. Nagisa pretends to not be scared of Ika, which upsets her. Eiko tries to convince Ika to just be friends with Nagisa, but Nagisa…
Ika gets a fever, which she believes to be a special Squidgirl disease revolving around a craving for shrimp, so Eiko tries to help her stay off shrimp until she gets better. Later, Ika learns about the fins on her hat and everyone tries t…
While trying to avoid Chizuru’s wrath after a failed attempt at doorbell ditching, Ika ends up making friends with a schoolgirl named Kiyomi Sakura. Ika invites Kiyomi over to the Aizawa household, but becomes paranoid that she’ll get puni…
On a rainy day, Ika exhibits a talent for art, though the depictions of her friends are somewhat scary. Later, Eiko tells Sanae that she should give up on her crush on Ika and try to become proper friends with her. However, holding herself…
Eiko finds an old doll from her childhood that freaks Ika out as it appears to move by itself overnight. As Eiko recalls the doll’s features, she and Sanae wonder about the whereabouts of the other doll in the set. Having witnessed her abi…
A beach volleyball tournament is held with a 3D television as top prize and Ika and Eiko decide to team up, managing to reach the finals against Gorō’s team. When Eiko twists her ankle during the match point, Chizuru takes her place and wi…