Ever seen a stingray dig?

So I've got a very younge male hystrix hybrid. He would be 7 months old. For the past couple months or so he seems to be digging in the sand. And no he's not covering him self for defence. It looks like he's biting down into the sand and using his body to flush away sand. He leaves deep pockets in the sand, and he mostly does this when the lights go out. Anyone ever experience this or know why?

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That's what I had figured, just thought I'd ask

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Haha mine used to swim up the glass I think he liked the current. He would swim on the glass towards the current and just hold his position but he hasent done that in a couple months now he just digs through the sand but I don't miss feedings. He's still on blood worms and he gets cut up pieces of shrimp every second day. What else do you guys feed your rays as there appetite grows?

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I've got a bichir in the tank who eats nightcrawlers, maybe ill throw an extra worm or two in there to see if he will take it.

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Well I put an extra earth worm into the tank for the stingray. Took him a while to find it but when he did holy moly he attacked it. After chewing on it for a while the indo datnoid decided he wanted the worm and he stole it lol...didn't take long and the stingray decided he wanted it back then there was a tug of war but the stingray won. He seems to be still crushing it but hasent swallowed it yet. Thanks for the tips everyone

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