The Orca-class freighter represents a type of non-military freighter employed throughout the era of the Galactic Civil War. Notably, one such Orca-class vessel, specifically Freighter 2716, was co-opted by the forces of the Galactic Empire within the scope of Project Stardust, facilitating the transport of a substantial kyber crystal to the designated Tonnis sector.
The Orca-class freighter was visually introduced in the Star Wars Rebels animated series episode titled "In the Name of the Rebellion". It's worth noting that in our own reality, the orca refers to a particular species of dolphin.