  Single crystals of CrSbSe$_3$, a structurally pseudo-one-dimensional
ferromagnetic semiconductor, were grown using a high-temperature solution
growth technique and were characterized by x-ray diffraction, anisotropic,
temperature- and field-dependent magnetization, temperature-dependent
resistivity and optical absorption measurements. A band gap of 0.7 eV was
determined from both resistivity and optical measurements. At high
temperatures, CrSbSe$_3$ is paramagnetic and isotropic with a Curie-Weiss
temperature of $\sim$145 K and an effective moment of $\sim$4.1 $\mu_B$/Cr. A
ferromagnetic transition occurs at $T_c$ = 71 K. The $a$-axis, perpendicular to
the chains in the structure, is the magnetic easy axis, while the chain axis
direction, along $b$, is the hard axis. Magnetic isotherms measured around
$T_c$ do not follow the behavior predicted by simple mean field critical
exponents for a second order phase transition. A tentative set of critical
exponents is estimated based on a modified Arrott plot analysis, giving
$\beta\sim$0.25, $\gamma\sim$1.38 and $\delta\sim$6.6.
