Dralthis led by Commander Krulan nar Ragitagha attacked two Confed Scimitars above a water planet. Both pilots and Krulan crashed on the planet. A swarm of Dralthis attempted to follow a Confed scout ship which spied Kilrathi space through a pulsar hypernode, however they ended up into an ambush set up by Geoffrey Tolwyn more than once. Dralthis were also the complement of the captured ship TCS Morgan and a Kilrathi Carrier around a ringed snow planet.
Surplus Dralthis were given to the primitive Dioscurans who were trained by the Kilrathi as pilots. These Dralthis beared tribal markings and were modified to operate only with a special coded signal transmitted by the Kilrathi command, so that the natives would never turn against their "benefactors".