This year (2023), together with Gökhan Aydın, we described a new Amphipod species (Gammarus morcae) 1260 m below the surface of Morca Cave in Turkey. It is undoubtedly one of the deepest records in caves or groundwater habitats. Meanwhile, we wonder which crustacean species have been reported from the deepest (excluding marine records). Any ideas? Greetings from Türkiye :)