Subject matches "Mesopelagic Zone (Ocean Twilight Zone)" or its children

Sunlit Zone, Twilight Zone, and Midnight Zone locations in the water column.

OTZ Mixing Pump and Migration Pump

A montage of Ocean Twilight Zone animals.

A person holding a hatchetfish.

Illustration depicting the ocean's Biological Carbon Pump.

Heidi Sosik and Joel Llopiz analyze shadowgraph images on display.

Stingray suspended from tow cable at water surface.

Andone Lavery and crew analyzing scattering layer data.

Front cover of the book, "Where the Weird Things Are".

Basler_avA2300-25gm__22955661__20200313_062100184_16328

Basler_avA2300-25gm__22955661__20200312_200033982_33800

Basler_avA2300-25gm__22955661__20200313_062100184_36850

Basler_avA2300-25gm__22955661__20200313_070915008_19838

Basler_avA2300-25gm__22955661__20200313_090857296_29436

Basler_avA2300-25gm__22955661__20200313_090857296_66558

Salp, Basler_avA2300-25gm__22955661__20200313_090857296_42070

Basler_avA2300-25gm__22955661__20200313_104735265_29638

Salp, Basler_avA2300-25gm__22955661__20200313_104735265_14340

Fish, Basler_avA2300-25gm__22955661__20200313_142150346_19014

Fish, Basler_avA2300-25gm__22955661__20200313_222956310_41836