Facultative air-breathing in the genus ; Hovers above the substrate, in a slightly diagonal position, with caudal fin curved to one side. Inhabits water at least a meter's depth, over silty substrate, near clumps of aquatic plants and the freshwater mangrove Barringtonia racemosa .
Dorsal spines (total): 7; Dorsal soft rays (total): 8 - 9; Anal spines: 1; Anal soft rays: 7 - 9; Vertebrae: 27 - 28. Live color yellow for male yellowish grey for female . Longitudinal scales 37-30; TRB 8-10; predorsal scales 11-19; scales on nape reaching nearly up to eyes or past preopercular edge; vertebrae modally 11+16; below the eye often with about 6 short rows of transverse papillae, transverse rows sometimes developed as part of longitudinal rows c and cp . Caudal fin rounded to slightly truncate .: fusiform / normal; Cross section: compressed.
Behavioural data for Mugilogobius Rexi is currently being reviewed.
Freshwater; benthopelagic. Tropical
The following diseases are known to affect Mugilogobius Rexi.
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