What should I name my Firefish instance - Lemmy.world

I run a server https://calckey.world [https://calckey.world] , which used to be CalcKey, but the software was re-branded to Firefish. Unfortunately, firefish.world is taken. What domain should I use for my new Firefish instance? Preferably a .world domain. I have remembered these options suggested to me so far: - dartfish.world (a sort of fish similar to the firefish) - fedifish.world - fire-fish.world - f-fish.world Any other suggestions? Or do you like one of the above?