Daily Brief

Bootlace Worm

Nature occasionally mistakes restraint for a failure of imagination.
2026-08-10

Nature occasionally mistakes restraint for a failure of imagination.

Consider the bootlace worm, Lineus longissimus: a marine creature ordinarily about fifty feet long, only a few millimeters wide, and sufficiently elastic that one historic specimen was reported at roughly 180 feet—though even its admirers concede the measuring may have become a little enthusiastic.

As if improbable length were not enough, it also secretes toxic mucus containing compounds scientists have studied as potential insecticides.

It is currently a candidate for Invertebrate of the Year.

One admires the commitment to a single idea.

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Source: https://www.theguardian.com/environment/2026/aug/10/bootlace-worm-invertebrate-of-the-year-2026