Wow this is a new one for me to we learn something new everyday
It's probably true but we don't spot them on natural coloured sand but they would stand out more on black sand
Could this be another reason as to why not to keep rays in bare tanks as they wouldn't grind them down as often as they would sifting throw sand
Makes me wonder if the black sand was so sharp it was grinding down the teeth to fast that's why you are seeing bigger chunks of teeth or is my substrate built up with loads of tooth dust
Interesting topic
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