We characterise the biodiversity of the taxonomically entangled krill genus Hansarsia in the deep Atlantic by applying an integrative approach. Molecular and morphological analyses suggest at least six species of Hansarsia instead of the currently recognised four. We describe one new species and wait for males to describe the second one. The results confirm ongoing diversification of the Atlantic krill and show an unusual trend in the evolution of euphausiids, in which visual recognition enhances tactile interaction during mating. (Image credit: D. Kulagin.)