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An aquatic sill (or an oceanic sill) is a sea floor (or lake floor) barrier of relatively shallow depth restricting water movement between oceanic basins.[1]


Aquatic sills as barriersEdit

An aquatic sill can be a biogeographic barrier for species located in deep basins on either side. On top of an aquatic sill, water is often warmer than deeper water.[1]

An aquatic sill can restrict movement of water masses in the bottom, and also results in their isolation, which can be partial, and is sometimes near total.[2]


See alsoEdit


  1. ^ a b "Sills". Sills. Blue Habitats. Retrieved 25 September 2017.
  2. ^ "Ocean Basin".

External linksEdit