Comparison between the mass and length of the velocity- coherent structures identified in our survey. Upper panel: mass and length values of the 152 velocity-coherent fiber-like structures identified in this work (colour-coded circles; see legend). Additional points indicate the mean properties of the parsec-size filaments explored by the HGBS in nearby clouds (grey squares; Arzoumanian et al. 2019) as well as the previously reported fibers (grey triangles; see Hacar et al. 2023, and references therein). Lower panel: same as upper panel but showing those star-forming fibers in our sample highlighted in colour and shown with symbols sizes proportional to the number of protostars in them (see legend). In both panels, a curve (solid red line) indicates the virial line mass m_vir computed at 20 K (see Sect. 5.3). Also, diagonal lines (dashed grey lines) represent constant line masses of 10, 50, and 100 M_⊙ pc⁻¹ , respectively.