BlockTalk Find Your Set

Free tool

LEGO Missing Piece Checker

Rule out the usual hiding places first. If the piece really is gone, check the set piece by piece and leave with the element ID LEGO asks for, or a link to buy the part.

Deep Sea Predator

Checking

6155 Deep Sea Predator

99 pieces in 58 part and color combinations, plus 1 minifigure.

LEGO counts 103 pieces. This inventory comes from a separate parts catalog and lists 104, including the 5 parts inside the minifigures; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.

Before you call it missing

Builders who report a missing piece often find it in one of these places. Tick each one off as you look.

Show

Piece checklist

Black 46 pieces

  • Arm Grab Jaw Black Part 4221 Element 422126 ×2
  • Arm Holder Brick 1 x 2 with 2 Horizontal Fingers Black Part 30014 Element 3001426 ×2
  • Arm Piece Straight with 2 and 3 Fingers Black Part 3612 Element 610126 ×2
  • Brick Arch 1 x 4 Black Part 3659 Element 365926 ×2
  • Brick Sloped 45° 2 x 3 Black Part 3038 Element 303826 ×2
  • Brick Sloped Inverted 45° 4 x 4 Double with 4 x 2 Recessed Black Part 4854 Element 4643321 or 4603490 ×2
  • Brick Wedged, Sloped Inverted 11 x 4 x 2 2/3 Cockpit Black Part 6058 Element 605826 ×1
  • Brick Wedged, Sloped Inverted 4 x 4 Triple [2 Connections between Front Studs] Black Part 4855 Element 4550004 or 4278249 ×1
  • Hinge Vehicle Roof Holder 1 x 4 Black Part 4315 Element 4250225 or 431576 ×2
  • Magnet Cylindrical Black Part 73092 Element 73092 ×2
  • Magnet Holder 2 x 3 Black Part 2607 Element 260726 ×1
  • Minifig Footwear Flipper [Thin] Black Part 59275 ×2
  • Plate 1 x 1 Black Part 3024 Element 302426 ×4
  • Plate 1 x 2 Black Part 3023 Element 302326 ×5
  • Plate 1 x 3 Black Part 3623 Element 362326 ×2
  • Plate 1 x 4 Black Part 3710 Element 371026 ×3
  • Plate 2 x 16 Black Part 4282 Element 428276 or 428226 ×1
  • Plate 2 x 2 Black Part 3022 Element 302226 ×1
  • Plate 4 x 4 Black Part 3031 Element 4243819 or 303126 ×1
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Black Part 4081b Element 6281993 or 4632571 ×2
  • Propeller Housing Black Part 6040 Element 4144525 or 604026 ×1
  • Tail Old with Aquazone Aquashark Blue Shark with Red X Print Black Part 3587pr0001 Element 81818 ×1
  • Wedge Plate 3 x 6 Cut Corners Black Part 2419 Element 241926 ×1
  • Wedge Plate 4 x 4 Wing Left Black Part 3936 Element 4280156 or 4189084 ×1
  • Wedge Plate 4 x 4 Wing Right Black Part 3935 Element 4280157 or 4189086 ×1
  • Windscreen 10 x 4 x 2 1/3 Canopy with Blue Outlines and Red Square Print Black Part 2507pr0004 ×1

Blue 32 pieces

  • Arm Grab Jaw Holder, 3 Fingers Blue Part 4220 Element 4107527 or 422023 ×1
  • Arm Piece Straight with 2 and 3 Fingers Blue Part 3612 Element 610123 ×6
  • Arm Piece with Pin, 3 Fingers Blue Part 6217 Element 604723 ×1
  • Brick 1 x 2 Blue Part 3004 Element 4613959 or 300423 ×1
  • Brick 1 x 3 Blue Part 3622 Element 362223 ×2
  • Brick 1 x 8 Blue Part 3008 Element 300823 ×2
  • Brick Sloped 33° 3 x 2 Blue Part 3298 Element 6294307 or 6141996 ×1
  • Brick Sloped 45° 2 x 2 with Grid Screen, Shark, and Controls on Red Panel Print (Aquazone) Blue Part 3039pr9980 Element 81822 ×1
  • Cone 1 x 1 [No Top Groove] Blue Part 4589 Element 4520957 or 458923 ×4
  • Magnet Holder Tile 2 x 2 - Short Arms Blue Part 2609a ×1
  • Plate 1 x 1 Blue Part 3024 Element 302423 ×2
  • Plate 1 x 3 Blue Part 3623 Element 362323 ×2
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×2
  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×1
  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Blue Part 4085c Element 408523 ×2
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 6mm] Blue Part 4623 Element 4280139 ×2
  • Tile Special 1 x 2 with Handle Blue Part 2432 Element 243223 ×1

Trans-Neon Orange 8 pieces

  • Arm Piece 90° Turn [2 / 3 Fingers] Trans-Neon Orange Part 412 Element 3001547 ×4
  • Box 2 x 2 x 2 Door with Slot Trans-Neon Orange Part 4346 Element 3005947 ×1
  • Box 2 x 2 x 2 [Hollow Studs] Trans-Neon Orange Part 4345b Element 3006047 ×1
  • Propeller 3 Blade 3 Diameter with Axle Cross Trans-Neon Orange Part 6041 Element 4165521 or 604147 ×1
  • Windscreen 10 x 4 x 2 1/3 Canopy with Black Aquasharks Print Trans-Neon Orange Part 2507pr0002 ×1

Chrome Silver 5 pieces

  • Rock 1 x 1 Crystal 5 Point Chrome Silver Part 30385 Element 4119342 ×1
  • Weapon Dagger / Knife Chrome Silver Part 37 Element 70749 ×2
  • Weapon Harpoon [4 Grooves on Shaft] Chrome Silver Part 57467 ×2

Red 4 pieces

  • Plant, Prickly Bush 2 x 2 x 3 Extension with 2 x 2 center Red Part 6065 Element 606521 ×1
  • Plate 1 x 2 Red Part 3023 Element 302321 ×2
  • Wedge Plate 3 x 4 without Stud Notches Red Part 4859 ×1

Dark Gray 2 pieces

  • Animal Body Part, Shark Body, without Bottom Tube Dark Gray Part 2547 Element 4160823 or 4107475 ×1
  • Animal Body Part, Shark Head Dark Gray Part 2548 Element 4160805 or 254827 ×1

Green 1 piece

  • Plant, Bush 2 x 2 x 4 Green Part 6064 Element 6269009 or 606428 ×1

Light Gray 1 piece

  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×1

Minifigures 1 figure

  • Aquashark 1 Minifigure, checked as a whole figure ×1

Tick each piece as you find it, or mark it missing.

When a piece really is missing

Ask LEGO

LEGO takes requests for pieces missing from a new set through its customer service site. The form asks for the set number and each piece's element ID, the number printed beside the piece in the parts list at the back of the instructions. This checker lists both.

Request a replacement from LEGO

Buy the piece

Mark a piece missing and your list links it to an eBay search for that part, which also covers pieces from older or second-hand sets.

Keep a record

Copy or download your missing list (the CSV opens in any spreadsheet), or print the whole checklist and tick pieces off on paper. Your marks stay in this browser, so you can check a big set over several sittings.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy