Congratulations on your success with the challenging Dragon Sea Moths! And thank you very much for sharing your experience keeping these fascinating fish with the rest of the group. It sounds like they would make good tankmates for seahorses under the right circumstances and that a diligent aquarist with a knowledge of their specialized aquarium requirements and a suitable system at his or her disposal can feel free to give them a try. They sound like inoffensive, deliberate feeders and fascinating personality fish with interesting behaviors — in short, a good match for seahorses!
Best wishes with all your fishes, Marcela, and thanks again!