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We just fixed downloads: every STL now comes straight from fast, reliable storage, saved under its own name, we're making 10,000 STL files and dozens of new tools, so things might break. We'll fix them ASAP.

Fanned into a near-perfect half circle, the huge tail of this halfmoon betta fish dominates the sculpt with dozens of fine ripples and ray lines. The flowing dorsal fin merges into the tail, while wispy ventral fins drape below a compact, scaled body. Up front, the head shows a round eye, a small upturned mouth and detailed gill plates. Shown in side view with no base, it captures the show-fish posture fishkeepers love. It suits a display shelf, a betta enthusiast's desk or a biology lesson on selective breeding and fin shapes.

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