Awesomeness Withdrawal: With only 13 episodes, some fans can't find the same kind of amusement when watching the anime shows in the Winter 2011 and beyond that they found in Ika Musume. Luckily the manga ran until Feburary 2016 for about 300 chapters.
Fridge Horror: Squid Girl wants to invade the surface to free the seas of pollution and exploitation. The first thing that happens to her when she surfaces is that she's contractually bound into working at a store at ridiculously low wages, (she's paying off the damages created for making a hole in the wall, and supposedly the repairs will cost five or six years of work). Squid Girl's arguably the best worker they've got too, as she's both an attraction and has ten extendable limbs not including her arms. In short, she's being exploited, just like the rest of the ocean she so dearly wishes to protect. Luckily, the show never tends to focus on this aspect too much.
The store is destroyed and rebuilt by the American research team in episode 9. And yet the patched hole in the wall can clearly be seen in later episodes. So what, they rebuilt the wall, complete with patch?
Chizuru might have requested (rather, demanded) this specifically, considering how she wants Ika to continue working at Lemon.
Was Cindy just yanking Eiko's chain in episode S2 4.1 when she seemed to suddenly forget Japanese?
Friendly Fandoms: With Splatoon, due to them both having squids. The creator of the manga has even drawn Splatoon fanart, and Ika's outfit is available as in-game content.
Ika: I feel violated. *eyes tiny with shock/horror*
Tear Jerker: The end ofThe entirety of "Won't You Keep It?". What the hell, man.
Ika Model One! You were a real hero!
And the paper hat in the first episode. ...you know what, Ika can form a friendship with a rock and manage to make us tear up!
You had to say that! Episode 4-3, Season 2.
Let's just have a moment of silence for Ika's umbrella, alright?
Though she kinda deserves it for being so creepily obsessed, it was heartbreaking to see Sanae's increasing breakdown as she tries to give up her Ika-chan, culminating in her deleting all of her pics and burning the costumes from episode 2, while tearfully saying goodbye to her unrequited love.
The Woobie: Chizuru of all people. Even her own siblings are afraid of the sight of her with her eyes open, which leads her to stop wearing contact lenses. In Season 2 Episode 11.3 and OVA 1.2 she seems hurt by the fact that Ika and Ayumi don't think she's human.