  We report the serendipituous discovery of a conspicuous alignment of galaxies
in a field obtained through the STIS Parallel Shear Survey. This project
collects randomly distributed 50'' x 50'' fields to investigate the cosmic
shear effect on this scale. Analyzing the parallel observations having the
Seyfert galaxy NGC625 as primary target, we recognized over the whole field of
view a strong apparent tangential alignment of galaxy ellipticities towards the
image center. The field shows several arclet-like features typical for images
of massive galaxy clusters, but no obvious over-density of bright foreground
galaxies. We also find a multiple image candidate. On the basis of the possible
strong and weak lensing effect within the data, we discuss whether this could
be compatible with a massive halo with no clear optical counterpart.
