Sea Serpent (40912-1) is a LEGO Ideas and CUUSOO LEGO set released in 2026 with 241 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing LEGO Ideas and CUUSOO sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 2 minifigures and 92 unique part types.
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Building instructions
Official LEGO instructions — read on BrickID
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Minifigures in Sea Serpent
Parts in this set
92 parts · page 1 of 2 · updating…
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Antenna 1 x 4 with Flat Top3957b · ×4 · Reddish Brown -
Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]3484 · ×4 · Reddish Brown
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Bar 3L87994 · ×1 · White
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Barrel 2 x 2 x 22489 · ×1 · Dark Brown
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Bracket 1 x 1 - 1 x 1 Inverted36840 · ×6 · Reddish Brown
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Bracket 1 x 1 - 1 x 279389 · ×2 · Reddish Brown
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Bracket 1 x 1 - 1 x 2 Inverted73825 · ×10 · Reddish Brown
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Bracket 1 x 2 - 1 x 2 Inverted99780 · ×2 · Reddish Brown
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Brick Arch 1 x 6 Raised Arch92950 · ×1 · Black
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Brick Curved 1 x 2 x 1 2/3 with 1 Cutout5907 · ×4 · Red
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Brick Curved 2 x 1 with Inverted Cutout78666 · ×2 · Black
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Brick Curved 4 x 1 Double with No Studs93273 · ×2 · Black
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Brick Round 1 x 1 Open Stud3062b · ×2 · Black
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Brick Round, Curved 10 x 2 x 2 with Rounded End Left77180 · ×2 · Black
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Brick Round, Curved 10 x 2 x 2 with Rounded End Right77182 · ×2 · Black
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Brick Special 1 x 1 x 1 2/3 with Studs on 1 Side32952 · ×6 · Dark Bluish Gray
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Brick Special 1 x 1 x 1 2/3 with Studs on 1 Side32952 · ×6 · Black
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Brick Special 1 x 2 Palisade [aka Log]30136 · ×2 · Black
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Brick Special 1 x 2 x 1 2/3 with 4 Studs on 1 Side22885 · ×4 · White
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Brick Special 1 x 2 x 1 2/3 with 8 Studs on 3 Sides67329 · ×2 · Black
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Cone 1 x 1 [Top Groove]59900 · ×2 · Reddish Brown
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Container Box 2 x 2 x 1 Reinforced Bottom2821 · ×2 · Medium Nougat
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Equipment Goblet / Glass2343 · ×1 · Pearl Gold
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Equipment Oar / Paddle [Reinforced]87585 · ×2 · Reddish Brown
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Flag 4 x 1 Wavy [First Wave Right]4495b · ×2 · Pearl Gold
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Flag 4 x 1 Wavy [First Wave Right]4495b · ×1 · Dark Blue
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Hinge Brick 1 x 2 Base3937 · ×1 · Black
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Hinge Brick 2 x 2 Top Plate Thin6134 · ×1 · Black
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Hinge Plate 1 x 4 Swivel Top / Base - Hollow Clip [Complete Assembly]1927 · ×4 · Black
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Large Figure Weapon Lightsaber Hilt with Axle Hole and Two Bar Holders24122 · ×2 · Reddish Brown
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Plate 1 x 1 x 2/3 Half Round with Side Stud3386 · ×6 · Light Bluish Gray
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Plate 1 x 1 x 2/3 Half Round with Side Stud3386 · ×8 · Blue
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Plate 1 x 23023 · ×2 · White
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Plate 1 x 23023 · ×5 · Black
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Plate 1 x 43710 · ×2 · Reddish Brown
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Plate 1 x 43710 · ×3 · Black
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Plate 1 x 63666 · ×2 · Tan
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Plate 2 x 164282 · ×1 · Red
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Plate 2 x 33021 · ×2 · Black
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Plate 2 x 33021 · ×4 · Reddish Brown
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Plate 2 x 43020 · ×2 · White
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Plate 2 x 43020 · ×2 · Reddish Brown
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Plate 2 x 63795 · ×1 · Reddish Brown
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Plate 4 x 63032 · ×1 · Reddish Brown
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Plate Round 1 x 1 with Solid Stud6141 · ×8 · Pearl Gold
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Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)4032a · ×1 · Dark Brown
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![Plate Special 1 x 2 [Side Handle Closed Ends]](https://cdn.rebrickable.com/media/parts/elements/4225201.jpg)
Plate Special 1 x 2 [Side Handle Closed Ends]48336 · ×1 · Black -
Plate Special 1 x 2 Rounded with 2 Open Studs35480 · ×13 · Black