It starts with SpongeBob feeding Gary. He accidentally drops the food and chaos comes. Then, SpongeBob goes to work. Gary tries to come with him but SpongeBob can't bring pets to work and leaves Gary. Gary then turns on the TV and watches a cowboy show. At the Krusty Krab, a customer comes in with his pet worm. SpongeBob explains that people can't bring their pets. The man is just about to leave when Mr. Krabs
came and told him to buy Krabby Patties. He says to the man that he is a responsible pet owner. Then, SpongeBob feels that Gary is lonely after what Mr Krabs says, and buys another pet. He spots a stand with ridiculously cute Nudibranches. SpongeBob sees a cute green one with purple eyes, huge pink lips and blue fins He says he wants that one, but an old peddler woman (she owns the Nudibranches) warns him that looks can be deceiving because the Nudibranches are violent and dangerous, especially around other animals. Naturally SpongeBob ignores her warning and takes it home anyway while lady says to herself that the people never listen. When he gets home Gary is watching TV. SpongeBob gets in front of the screen to show Gary his new friend, then leaves to make enchiladas. While in the kitchen, Gary is chewing his toy in front of Puffy. Puffy then growls and scares Gary to go behind the couch while Puffy chews his toy apart. Puffy, about to bite Gary, sees that SpongeBob is coming back and turns himself back to a nice Nudibranch. SpongeBob gets Gary's bowl and makes a slash on it with marker. On the other side of the slash, he writes "Puffy Fluffy". Gary starts to eat when Puffy Fluffy Growls at him again. Then Puffy eat every single piece of food in the bowl. SpongeBob sees that Gary is hiding from Puffy again. Gary then jumps on SpongeBob while Puffy looks like he has absolutely no idea why Gary's on SpongeBob. SpongeBob tells Gary he is going to sleep with Puffy Fluffy tonight. When he puts Gary in the bed, he hisses at Puffy. During the night Gary wakes up and sees Puffy's skin on the bed. He walks in the kitchen to see a huge eel eating in the refrigerator. The eel is revealed to be Puffy Fluffy! He seems to now have five tongues with a mouth on each. Puffy then attacks Gary. Gary is relieved when SpongeBob enters the kitchen, only to be shocked when instead of helping him his owner starts berating him for how he's still treating Puffy, even when the eel is clearly about to eat him. Puffy uses its tongues and grabs onto SpongeBob, who's still berating his snail even as he's about to be eaten. It's up to Gary to save his master. Using a leash he whips at Puffy, driving it from the Pineapple home. SpongeBob chases after the beast crying for it not to go, then turning and admonishing Gary for chasing Puffy away, to which he gets an ruthless glare. SpongeBob brings Gary to work the next day so he's not lonely.
APM Music Identification
Drama Link D - Mr. Krabs sees a customer leaving his restaurant.
Drama Link F - Gary frightenly comes running onto SpongeBob's bed.
Drama Link C - Gary notices something strange about Puffy-Fluffy.
The theme of getting a pet from a mysterious old person that is potentially dangerous having a cute creature become a monster, and a good pet destroying the monster parodies 'Gremlins'. Only more so as SpongeBob blatantly ignores the peddler's words of caution and just breaks into her caravan and takes one without permission.
This is generally considered by fans to be one of the worst SpongeBob episodes ever due to SpongeBob being incredibly spastic and saying that Gary was hurting Puffy Fluffy, while it was totally opposite.
Fifth time they showed SpongeBob's library: the first was Boating School.
Puffy Fluffy is shown with one tongue with no mouth when he was little but when he was a monster, he has about 7 tongues.
Nudibranchs, also known as Sea Slugs, are worm-like creatures, but in this episode, they're portrayed as plump, fluffy fish.
Interestingly, a slug is simply a snail without a shell, and while Gary is a snail, Puffy Fluffy is a sea slug.
Puffy Fluffy tries to eat SpongeBob, which is appropriate, since nudibranchs eat sponges.
Spongebob acts drastically out of character, his stupidity and ignorance in this episode is clearly forced. towards his treatment of Gary, easily blaming him for the destruction in the house, not realizing Gary wouldn't do anything like what he blames him for, and thinking Gary turned into the giant monster that Puffy Fluffy became and tried to eat Gary.
This episode is one of the series worst received episodes due to SpongeBob's short attention span and his treatment of Gary.
SpongeBob actually stole Puffy Fluffy from the gypsy; he wasn't seen paying her anything for Puffy.