I found this episode to be Okay. I found SpongeBob's jokes to be poorly executed and I do love how some of the sea animals were portrayed as farm animals such as the clams being chickens and the jellyfish as a cow.
The ending however left me questioning, why were the other farmers aliens from another planet?
Pretty okay start to my least favorite season at the moment. The farm activities weren't that interesting but I think it was when the barn raising happened when I stopped caring. The episode just slaps random crap then, especially with the aliens which don't have anything to do with the plot. It's not bad but I wouldn't call it good.