Not too sure honestly-
The make little caves underneath my rock work though....My guess is if I had big enough spots in my rock,they might just live their instead of working so hard-But these guys are truelly like chiclids IMO-they never spot moveing the sand and makeing new caves....
i had a pair of fish like them, scissortail dartfish.. and i had some rock that was like a bunch of pillars connected at both ends.. kinda looked like a bio ball..
anyway they lived in the cracks of that.. but they, like firefish, will dig a burrow under a rock and not a true burrow like a jawfish or prawn goby