Galaxy and Mass Assembly (GAMA): Fine filaments of galaxies detected
  within voids
  Based on data from the Galaxy and Mass Assembly (GAMA) survey, we report on
the discovery of structures that we refer to as `tendrils' of galaxies:
coherent, thin chains of galaxies that are rooted in filaments and terminate in
neighbouring filaments or voids. On average, tendrils contain 6 galaxies and
span 10 $h^{-1}$ Mpc. We use the so-called line correlation function to prove
that tendrils represent real structures rather than accidental alignments. We
show that voids found in the SDSS-DR7 survey that overlap with GAMA regions
contain a large number of galaxies, primarily belonging to tendrils. This
implies that void sizes are strongly dependent on the number density and
sensitivity limits of a survey. We caution that galaxies in low density
regions, that may be defined as `void galaxies,' will have local galaxy number
densities that depend on such observational limits and are likely higher than
can be directly measured.
