The video shows a man transporting a fish from a bucket of nice fish-friendly water to a container filled with an unspecified substance (we know it's not liquid nitrogen, as the temperature is shown at -35 in the beginning, which is too warm for nitrogen to still be in liquid form, no matter the unit).
A subduction zone is formed at a convergent plate boundary when one or both of the tectonic plates is composed of oceanic crust. The denser plate, made of oceanic crust, is subducted underneath the less dense plate, which can be either continental or oceanic crust.
1 The boundary between two plates can be a divergent boundary, a convergent boundary or a transform boundary. 2  The lithosphere is composed of the crust, and some of the upper mantle. 3  Mature oceanic plate is approximately 80-100 km thick, of which, the upper 5-7 km is oceanic crust. At some convergent boundaries, oceanic plate meets continental plate. 2  An example of this is the west coast of southern Mexico, Central America and South America. 3  An oceanic trench forms offshore, and a chain of volcanic mountains forms just inland of the coast.