  We investigate some aspects of the $(2+1)$-dimensional Gauss-Bonnet black
hole proposed in [1][2]. The perturbations of scalar and massless spinorial
fields are studied suggesting the dynamical stability of the geometry. The
field evolution is analyzed calculating the quasinormal modes for different
parameters and exploring the influence of the coupling constant of the theory.
The hydrodynamical modes are also obtained in the small coupling limit.
Furthermore, the entropy bound and the dominant semiclassical correction to the
black hole entropy are calculated.
