In recent decades the World has been faced with the Anthropocene extinction. Discovery of species new to science is increasing in pace, but their formal description is a time consuming process. As a result, it is predicted that many species will become extinct before they are described. This is particularly important in deep-sea environments, where there is so much yet to discover. At the same time there is a growing interest in their exploration and future use e.g. for deep-sea mining. To speed up the description process of deep-sea species, the International Seabed Authority within the Sustainable Seabed Knowledge Initiative started “One thousand reasons” project that aims to describe 1000 species new to science before 2030. Within this call a taxonomic workshop: “New species of Amphipoda from the Clarion-Clipperton Zone” held in 2024 (5th – 14th February) at the University of Lodz, Poland was granted. It gave the momentum for description of multiple species from the central Pacific abyss.

This Special Issue is dedicated to publications of the new deep-sea amphipod species that were described as a result of the project. However, other manuscripts that describe new amphipod species from Clarion-Clipperton Zone are also welcome.