A review of the latest analyses from the LHCb experiment on charmless $B$-meson decays is presented. Emphasis is given on the first observation of the rare two-body baryonic decay $B^0 \to p \bar{p}$ and the observation of several multi-body baryonic decays of the $B^0$ and $B_s^0$ mesons. The decay mode $B^0 \to p \bar{p}$ is the rarest decay of the $B^0$ meson observed to date.
Its branching fraction is determined to be
$$\cal{B}(B^0 \to p \bar{p}) = ( 1.25 \pm 0.27 \pm 0.18 ) \times 10^{-8} \,,$$
where the first uncertainty is statistical and the second systematic.