|Behind the scenes|
- "This is Big Jim's cage. He just came over from another zoo, so he's in his own private environment for now. He's very gentle."
When the Animorphs intially entered The Gardens to acquire battle morphs to attack the Yeerk pool, it was Marco who acquired Big Jim. Big Jim was Marco's very first morph, and became his primary battle morph.
Later when the Animorphs began recruiting new members, one of the new recruits also acquired a gorilla morph in the Gardens; it is unknown whether this gorilla is Big Jim or not.