bathyal

adj

1. (not-comparable)Relating to the ocean bottom, between the sublittoral and abyssal zones, at a depth of between 200 and 2000 metres

   “Accessory benthic foraminiferal events reported by Berggren and Miller (1989) to occur in the late Eocene are the migrations into the bathyal realm from the neritic realm of planulinids and siphoninids.”