There are many crabs and lobsters present at Shell City, some of which are hermit crabs.
One of the lobsters squirts glue at the Cyclops, knocking him down onto the ground. They then help defeat the Cyclops.
Some seahorses are present at Shell City. They are colored orange and white. They are the first animals revived by the flooding caused by SpongeBob and Patrick. They are the same type of seahorses as the ones used by King Neptune and Mindy for their carriage.
No octopuses initially appear when SpongeBob and Patrick notice the dried fish from the bowl where they are imprisoned. A couple of octopuses appear after the reviving of the dried fish, helping other sea creatures to defeat the Cyclops, wrapping him with their tentacles.
A musical band composed by three fish who appear in Shell City. They wear sombreros, have mustaches, and play ranchera-type music. They also wear a brown shirt with golden epaulets, a golden belt, and brown pants with a yellow zigzag motif.
They are initially seen dried up, but they are later revived. They start to play their music as the other revived sea creatures start to attack the Cyclops. The Mariachi band stop their music for a bit, then restart to play it faster.
Pufferfish
A yellow pufferfish appears in Shell City. It is the second dried animal after the seahorses to be revived by the water. It is not seen to fight the Cyclops.
Trivia
Some animals like octopuses do not initially appear in a dried-up state, File:The SpongeBob SquarePants Movie 626.pngThe Shell City creatures angry at the Cyclops.but rather later appear in an animated form when the other sea creatures are revived by the water.
The model used for the dry pufferfish is the same exact one that was used in the episodes "Krusty Love" for Mr. Puff.
