These are my rays, I posted the video as they were getting very aggressive when I approached the tank and I was looking for advice on preventing it. Luckily they have calmed down alot recently.
The darker ray has always had very dark patterning, it is not black at all but dark chocolate brown with lighter marks. The vid just isn't very good as I used my phone. Having seen new born retics with very similar pattern (and much longer tales) I believe it is a retic with a broken tale. It also has an injury and is missing both a clasper and a full fin as well as a small notch of tale, I've attached some old pics to show.
His remaining clasper has enlarged and taken on the twisted appearance around 3 months ago which also indicates a retic as he is only 8" dia, but just a particularly dark one.
There are a couple more pics here but he is really in the background.
N


The darker ray has always had very dark patterning, it is not black at all but dark chocolate brown with lighter marks. The vid just isn't very good as I used my phone. Having seen new born retics with very similar pattern (and much longer tales) I believe it is a retic with a broken tale. It also has an injury and is missing both a clasper and a full fin as well as a small notch of tale, I've attached some old pics to show.
His remaining clasper has enlarged and taken on the twisted appearance around 3 months ago which also indicates a retic as he is only 8" dia, but just a particularly dark one.
There are a couple more pics here but he is really in the background.
N


