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Mermaid Gabby's Aquarium Adventure

Mermaid Gabby's Aquarium Adventure

11204-1·LEGO·2025·3 minifigs·54 parts

Used Avg
$33.28
New Avg
$20.40
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About Mermaid Gabby's Aquarium Adventure

Mermaid Gabby's Aquarium Adventure (11204-1) is a LEGO LEGO set released in 2025, currently averaging $33.28 used on BrickLink. It comes with 3 minifigures worth a combined $19.48. It may still be available at retail from LEGO or authorized retailers. The full parts inventory runs 54 pieces.

Part-out value

Minifig value: $19.48 out of $33.28 total (59%). Over half the set's resale value is in the figures. Sellers parting this set out should list the minifigs individually on BrickLink — they'll earn more than bundling everything together.

Minifigures in Mermaid Gabby's Aquarium Adventure (3)

MerCat
MerCat
gdh004$1.81
Gabby - Mermaid
Gabby - Mermaid
gdh016$9.48
Kitty Jellyfish
Kitty Jellyfish
gdh017$8.19

Parts (54)

Slope, Curved 2 x 1 x 2/3
Slope, Curved 2 x 1 x 2/3
Tan
Arch 1 x 3 x 3
Arch 1 x 3 x 3
Tan×4
Arch 1 x 3 x 3
Arch 1 x 3 x 3
Medium Azure×4
Slope 45 2 x 1 Triple with Bottom Stud Holder
Slope 45 2 x 1 Triple with Bottom Stud Holder
Blue×2
Plate, Modified 1 x 2 with 1 Stud with Groove and Bottom Stud Holder (Jumper)
Plate, Modified 1 x 2 with 1 Stud with Groove and Bottom Stud Holder (Jumper)
Dark Pink
Rock 1 x 1 Jewel Heart Shaped
Rock 1 x 1 Jewel Heart Shaped
Trans-Dark Pink
Arch 1 x 8 x 2 Raised
Arch 1 x 8 x 2 Raised
Tan×2
Arch 1 x 3 x 2 Inverted
Arch 1 x 3 x 2 Inverted
Medium Azure×2
Tile, Round 2 x 2 with Open Stud
Tile, Round 2 x 2 with Open Stud
Dark Pink×2
Windscreen 4 x 4 x 1 2/3 Canopy Dome Half Sphere with Bar Handle
Windscreen 4 x 4 x 1 2/3 Canopy Dome Half Sphere with Bar Handle
Trans-Light Blue
Bar Holder with Handle
Bar Holder with Handle
Blue
Tile, Modified 1 x 2 Grille with Bottom Groove
Tile, Modified 1 x 2 Grille with Bottom Groove
Dark Azure
Tile 1 x 4
Tile 1 x 4
Medium Azure×2
Tile, Modified 2 x 2 with Pin
Tile, Modified 2 x 2 with Pin
Black
Brick, Modified 8 x 8 x 2/3 with 1 x 4 Indentations
Brick, Modified 8 x 8 x 2/3 with 1 x 4 Indentations
Blue
Slide Playground 6 x 6 x 6 Curved 90 degrees
Slide Playground 6 x 6 x 6 Curved 90 degrees
Medium Azure
Brick 2 x 3
Brick 2 x 3
Tan
Brick 1 x 1
Brick 1 x 1
Medium Azure×4
Brick 1 x 4
Brick 1 x 4
Tan×2
Plate 2 x 4
Plate 2 x 4
Light Aqua×2
Plate 2 x 3
Plate 2 x 3
Medium Azure×2
Plate 1 x 2
Plate 1 x 2
Light Aqua×2
Plate 4 x 4
Plate 4 x 4
Tan
Plate 2 x 8
Plate 2 x 8
Tan×2
Tile 1 x 2
Tile 1 x 2
Blue
Tile 1 x 2
Tile 1 x 2
Dark Azure×4
Brick 1 x 2 x 2 with Inside Stud Holder
Brick 1 x 2 x 2 with Inside Stud Holder
Tan×2
Plant Plate, Round 1 x 1 with 3 Layered Leaves
Plant Plate, Round 1 x 1 with 3 Layered Leaves
Lime×3
Slope 65 2 x 2 x 2 with Bottom Tube
Slope 65 2 x 2 x 2 with Bottom Tube
Tan×2
Plate 1 x 4
Plate 1 x 4
Light Aqua
Slope, Curved 1 x 2 with Bottom Stud Holder
Slope, Curved 1 x 2 with Bottom Stud Holder
Light Aqua
Slope, Curved 1 x 2 with Bottom Stud Holder
Slope, Curved 1 x 2 with Bottom Stud Holder
Medium Azure×2
Plate 2 x 6
Plate 2 x 6
Medium Azure
Minifigure, Headgear Crown Eggshell with 5 Points and Center Stud
Minifigure, Headgear Crown Eggshell with 5 Points and Center Stud
Medium Lavender×2
Friends Accessories Cat Ears with Bright Pink Auricles and Metallic Light Blue Tip on Left Ear Pattern
Friends Accessories Cat Ears with Bright Pink Auricles and Metallic Light Blue Tip on Left Ear Pattern
Bright Pink
Plate, Round 8 x 8 Rounded End
Plate, Round 8 x 8 Rounded End
Blue×2
Plate, Modified 1 x 2 with Open O Clip on Top
Plate, Modified 1 x 2 with Open O Clip on Top
Blue×3
Cone 1 x 1 with Top Groove
Cone 1 x 1 with Top Groove
Trans-Light Blue×2
Plant Flower 2 x 2 Leaves - Angular
Plant Flower 2 x 2 Leaves - Angular
Bright Green×2
Container, Treasure Chest Bottom with Slots in Back
Container, Treasure Chest Bottom with Slots in Back
Medium Lavender
Plant Thallus / Seaweed / Coral
Plant Thallus / Seaweed / Coral
Coral×2
Friends Accessories, Marine Life, 12 in Bag (Multipack)
Friends Accessories, Marine Life, 12 in Bag (Multipack)
Neon Yellow
Cylinder Tube, Straight
Cylinder Tube, Straight
Trans-Bright Green
Brick, Round 2 x 2 Dome Top
Brick, Round 2 x 2 Dome Top
Trans-Light Blue×3
Brick, Round 2 x 2 Dome Top
Brick, Round 2 x 2 Dome Top
Satin Trans-Dark Pink×2
Plant Flower Round with 2 Layers (Peony Rose) with Open Stud and Small Pin Hole
Plant Flower Round with 2 Layers (Peony Rose) with Open Stud and Small Pin Hole
Trans-Yellow×2
Panel 1 x 6 x 5 with Wall Panel with Lime, Coral, and Tan Coral and Kitty Sea Life Pattern
Panel 1 x 6 x 5 with Wall Panel with Lime, Coral, and Tan Coral and Kitty Sea Life Pattern
Trans-Light Blue
Arch 1 x 4 x 2
Arch 1 x 4 x 2
Tan×2
Arch 1 x 2 Inverted
Arch 1 x 2 Inverted
Tan
Plate, Round Corner 2 x 2 with 1 x 1 Cutout
Plate, Round Corner 2 x 2 with 1 x 1 Cutout
White×2
Elephant Tail / Trunk with Bar End - Long Straight Tip
Elephant Tail / Trunk with Bar End - Long Straight Tip
Dark Pink×2
Container, Treasure Chest Lid Flat
Container, Treasure Chest Lid Flat
White
Brick, Round 4 x 4 with Hole
Brick, Round 4 x 4 with Hole
Tan
Plate, Modified 2 x 2 with Groove and 1 Stud in Center (Jumper)
Plate, Modified 2 x 2 with Groove and 1 Stud in Center (Jumper)
Medium Azure

Common questions about Mermaid Gabby's Aquarium Adventure

How much is LEGO Mermaid Gabby's Aquarium Adventure (11204-1) worth?

Mermaid Gabby's Aquarium Adventure sells for an average of $33.28 used and $20.40 new/sealed on BrickLink based on 6 months of completed sales. Current retail availability may affect secondary market prices. Actual prices vary with completeness — missing minifigures or key parts will lower the value.

What minifigures come in LEGO set 11204-1?

This set includes 3 minifigures: MerCat ($1.81), Gabby - Mermaid ($9.48), Kitty Jellyfish ($8.19). The minifigures have a combined BrickLink value of $19.48. Each figure is linked above with individual pricing if you're looking to buy or sell specific characters.

Is it worth parting out LEGO Mermaid Gabby's Aquarium Adventure?

The minifigures make up about 59% of the set value ($19.48 out of $33.28). Most of the value is in the complete set package, so selling it whole is likely the better move unless you have buyers lined up for specific figures.

Is LEGO Mermaid Gabby's Aquarium Adventure (11204-1) retired?

Mermaid Gabby's Aquarium Adventure was released in 2025. It should still be widely available at retail from LEGO and authorized retailers.

How do I check if my Mermaid Gabby's Aquarium Adventure set is complete?

Use the parts list on this page to check every piece and all 3 minifigures. For the minifigures specifically, you can use the brick'em scanner to identify each figure from a photo and confirm it matches what should be in this set. Missing pieces can be individually sourced on BrickLink.

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