  We take advantage of the NIRCam photometric observations available as part of
the Cosmic Evolution Early Release Science survey (CEERS) to identify and
analyse very red sources in an effort to discover very dusty star forming
galaxies. We select red galaxies as objects with a S/N>3 at 4.4 $\mu$m and a
S/N<2 in all JWST and HST filters at $\lambda\leq2\mu$m, which corresponds to
[F200W]-[F444W]>1.2 considering CEERS depths. This selection is ideal to
identify very dusty (Av>1 mag) galaxies with stellar masses between $10^6$ to
$10^{10}\, \rm M_{\odot}$ at z<5, more massive dusty galaxies at z=5-18 and
galaxies at z>18 due to the Lyman absorption, independently of their dust
extinction. Our sample of F200W-dropouts contains no strong candidates at
z>6.5, instead it consists almost completely (~81%) of z<2 low-mass galaxies,
with a median stellar mass of $10^{7.3} \rm M_{\odot}$. These galaxies show an
exceptional dust extinction with median value of Av=4.9 mag, completely
unexpected given their low stellar mass. The remaining galaxies, which are at
z<6.5, show similar large dust extinction (Av>1), but they are generally more
massive $>10^{7.5}\rm M_{\odot}$.
