  In the Dynamical Scotogenic Model, the global $B-L$ symmetry is supposed to
be broken spontaneously resulting in a massless Goldstone boson called majoron,
and massive right handed neutrinos which participate in the generation of light
neutrino massses at one-loop. One of them being the lightest stable particle
can be a thermal dark matter candidate. We discuss how the dark matter
phenomenology differs from the original Scotogenic model, taking into account
all the constraints coming from the observed neutrino masses and mixing, lepton
flavor violations such as $\mu \to e\gamma, \mu \to e J$, astrophysical and
cosmological observations of stellar cooling and $N_{eff}$, as well as collider
signatures such as Higgs invisible decays. We find that the dark matter
annihilation to majorons plays an important role to produce the right relic
abundance.
