A saltwater or reef aquarium is the most demanding tank to move because it is a delicate living ecosystem of fish, corals, invertebrates, and live rock, all sensitive to small changes. Beyond the usual rule of never moving a filled tank, you must keep the live rock and corals alive and stable, since a saltwater system can crash quickly. Speed and stable conditions are everything.
Pro tip: Insulated coolers with battery heaters keep livestock and live rock at a stable temperature on the drive.
Watch out: Saltwater systems crash fast. Keep live rock submerged and temperatures stable to protect the beneficial bacteria.