I feel like I would've liked this episode if it weren't basically a promotion for Kamp Koral. I really had to fight hard not to grab the remote. Given that I don't watch it, I didn't really know whether I should like the narwhals or not. I figured out that it would be a "thing that would not leave" plot from the beginning, though it was a surprise that the rest of the narwhals that showed up weren't really narwhals or Narlene's family. The episode's one saving grace was seeing Plankton's family again, though it was kinda random to have one of the Planktons look like Ma Angler.
So, I'm kinda torn between this episode being bad and just okay.