The invader returns for a second season. What I'd call a surprise hit from late 2010 was not going to go unnoticed this time around, it had a lot to squid up to. If you've seen season one (which I'm assuming you have), season 2 is exactly the same. There is absolutely no plot outside of Ika Musume came from the sea to invade the Earth for polluting the ocean and is now working at a beach shack. All the characters from last time are back too, and pretty much the same. Eiko still has a tsundere relationship with Ika Musume, Chizuru is still scary,Sanae is still in love with her, Nagisa is still scared, Cyndi and the three stooges still want to run experiments, etc. Kiyomi also returns with some side characters, who get no development, but are there to show Ika Musume made friends.

Like S1 there are some Mini-Ika segments too. While they are kawaii to the core, they do feel kinda out of place.

As far as quality of the episodes (each one has about 2-3 mini parts like in S1) there are a few that are better than the ones in S1, but in my opinion, a lot of them missed the mark. Don't get me wrong, they are still enjoyable, and funny, but they just aren't as funny for some reason. It's really one of those things you can't judge unless you've seen both.

While I normally don't go into the music, I do have complaints about the OP. It's just so... un Ika Musume like. The original OP was great, it was about invasion and really fit the show. This time around it's just... nice. The ED is pretty good though, like last time it's basically Ika (this time walking) and a stillish scene, but that changes based on what happened in an episode.

Overall I'd say Ika Musume S2 is an enjoyable anime that will keep a smile on your face, but failed to meet the charm that S1 delivered.