Im not saying it is normal or not, I'm simply saying I have seen that behavior from him.
He is usually in his cave now.
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Sorry I wasn't referring to your post I was commenting towards the guy that said it was normal to swim vertical as his Jurunese swims vertical. If yours is in the cave it will be fine and as time goes it will get comfortable and start to cruise all over the tank. They do prefer darker waters but my older one came to the top to grab smelts out of my hand any time of day.




