The male excavates the nest by removing small stones and pebbles, forming a depression about  deep and  in diameter with a fine gravel and sand bottom. Spawning occurs when a female moves over a nest and attaches to a rock.
The male digs the nest by removing small stones and pebbles, creating a shallow depression approximately  deep and  in diameter with a fine gravel and sand base. Spawning happens when a female moves over the nest and attaches to a rock.