Glass tardigrade for Minecraft: Hypsibius exemplaris, one block per nano-CT voxel.

Size: 608 blocks long (x, head toward +x), 188 tall (y, back up), 213 wide (z). One block = 270 nm, so the animal (152 µm) is built 3.7 million times life size.
Format: Sponge Schematic v2 (.schem), Java Edition 1.20+. Paste with WorldEdit or FastAsyncWorldEdit (//schem load tardigrade_270nm, then //paste), or import with Litematica. Needs 188 blocks of height between build limits (Java 1.18+ has 384).

Blocks:
  minecraft:glass                    body surface (cuticle), one block thick (235,575 blocks)
  minecraft:purple_concrete          pharynx (89,588 blocks)
  minecraft:lime_terracotta          oesophagus (8,512 blocks)
  minecraft:yellow_concrete          midgut and hindgut (701,710 blocks)
  minecraft:red_concrete             buccal tube (2,141 blocks)
  minecraft:green_concrete           ovary (66,536 blocks)
  minecraft:blue_concrete            ventral nervous system (probable) (81,677 blocks)
  minecraft:orange_concrete          storage cells (352,184 blocks)
  minecraft:cyan_concrete            Malpighian tubules (56,796 blocks)
  minecraft:brown_concrete           stylets (probable) (1,841 blocks)
  minecraft:lime_concrete            claw glands (35,056 blocks)
  minecraft:light_blue_concrete      brain (70,628 blocks)
  minecraft:pink_concrete            salivary glands (114,405 blocks)
  minecraft:blue_terracotta          ganglion under the pharynx (probable) (2,736 blocks)
  minecraft:magenta_concrete         unidentified paired ventral structure A (403 blocks)
  minecraft:magenta_terracotta       unidentified paired ventral structure B (1,016 blocks)
  minecraft:purple_terracotta        unidentified ventral structure C (249 blocks)

Organ names: Gross et al. identified every structure; we matched the unnamed labels in their files to their published volumes. "Probable" and "unidentified" are our calls.
The brain, salivary glands and small head structures come from their higher-resolution head scan, registered onto the whole body by us.

Data: Gross V, Müller M, Hehn L, Ferstl S, Allner S, Dierolf M, Achterhold K, Mayer G, Pfeiffer F (2019). X-ray imaging of a water bear offers a new look at tardigrade internal anatomy. Zoological Letters 5:14. doi:10.1186/s40851-019-0130-6. Data on figshare (collection 4502282), CC BY 4.0.
Build: tardigraph (Meow-Ludo), from those label fields and image stacks.


--- X-ray in stone ---
tardigrade_ct_270nm.schem is the raw X-ray itself: every voxel inside the body is one of 11 grey blocks, darkest to lightest by CT brightness: black concrete, polished blackstone, deepslate, tuff, stone, light gray concrete, andesite, smooth stone, diorite, calcite, quartz block. Same size and orientation as the organ build, solid all the way through, so dig in or cut it with WorldEdit (//cut on half the width) to see inside. Paste it the same way: //schem load tardigrade_ct_270nm then //paste.