The Field Guide is a book that only appears in the episode "Tea at the Treedome." It is known to contain information and an image of a "land squirrel."
The Field Guide appears to be a blue book with a picture of a black anchor on it. The words "Field Guide" are written at the top in bluish-white text.
Role in episode
one day, SpongeBob
comes across a strange creature
at the bottom of a cliff. The creature is wrestling a giant clam
. SpongeBob consults the guide to find out that the creature is a "land squirrel."