Aim of this colloquium is to gather the scientific community to exchange knowledge on recent developments in gravity currents, such as integral models using vorticity arguments, 3D numerical simulations and laboratory measurements. Contributions will enable these advances to be shared among the community and help promote further research within the field. The colloquium will also bring together engineers, geoscientists and oceanographers to survey the current state of understanding of gravity currents, from theoretical, computational and experimental perspectives and from direct observations in the environment and industry, with an emphasis on their fluid mechanics, so that new interdisciplinary collaborations can develop.