- The biggest gup (so far)
- Fits all of the Octonauts inside at one time.
- Octo-suction treads.
- Squirts out slippery slime.
- Unbreakable outer shell.
- Can separate into 3 additional vehicles (Octo-Ski, Tank, Glider).
- Can release rescue lines.
- Can lift its body above its chassis and turn the body around.
- Has a snack shooter.
- Can tilt.
- Has a Gup-X reconnector to reconnect the parts of the gup. (Revealed in The Loggerhead Sea Turtle)
Episodes featuring the Gup-X
- S02E04 Octonauts and the Great White Shark
- S03E08 Octonauts and the Yeti Crab
- S03E20 Octonauts and the Loggerhead Sea Turtle
- S04E14 Octonauts and the Surfing Snails
- Special Episode 2: Octonauts and the Great Christmas Rescue