so far 4 NOs .... well I will have to say YES. Toxotes blythii are 100% freshwater. They are top swimmers and are fast swimmers when needed. My only concern is that the motoro will get very large while blythii will stay smaller than its brackish counterparts....... I would say 8"s. If the tank is tall (ie 30" or taller) and has a large enough footprint, it shouldn't be a problem. T. blythii are ocassionally on sale here on MFK. Price ranges from $100 to $150 per specimen. Actually, there are 4 available now... being sold by one of the vendors here. These archers are very hardy and will acclimate to your rays water parameters (ie low TDS, etc).