Hystrix Rays get 12" across, unless in an extremly large aquarium. One of the reasons I chose the hystrix, is because it max's out a 12". And doesnt have an extremly long tail, like say a retic. I will be leaving room open for when I do get a 72x24. I don't know where you heard they get to 16" I've never read that. I've done my research, and almost all of the sources say they max out a 12" and some said that in rare cases they get to 14". Maybe 16" in the wild?
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10 Gallon
72W of Lighting
Onyx Sand
Paragoda Stone
Dwarf Hairgrass
3x Chinese Algae Eaters
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