My wrasse glass surfing!

[Notsolostfish]

Iv had this wrasse for over 2 months now. And its been doing great eating fine. Lately iv seen him glass surf a lot in that one particular spot. I dont know why. He wakes up from the sand, and goes straight to it. But eats no problems. Any idea what could be happening i tested my salinity and its 1.025 all other fish are fine. Its getting me anxious

 

[ISpeakForTheSeas]

To my knowledge, glass surfing is typically an indication of some sort of stress - the first thing that usually comes to my mind is reflection; if the fish can see its reflection, then it might be trying to fight with it:

glass shows reflections when there's a substantial difference in the amount of light on both sides (i.e. when one side is light and the other dark, the side with more light will start reflecting). So, if the lights are off outside of the tank but you have moonlighting or something on the inside of the tank, it's possible that the amount of light in the tank is enough to cause reflections on the glass.

I have no idea if this is the problem for your tank, but if it is you could just light up the dark side and the reflection would go away, or you could block the light from hitting the light side and that should get rid of the reflection as well. For it being lighter in the tank and darker out of it, I've seen someone put a white piece of paper on the outside of the their tank to reduce the light difference inside vs. outside, and that successfully eliminated the reflection they were getting; some other suggestions include blocking the light from hitting the glass inside, or putting little LED's around the outside to light it out and decrease the difference in light.

As I mentioned in my initial post, these reflections appear when one side of the glass is brightly lit and the other side is much darker.

So, to get rid of the reflection, try lighting up the outside of the tank and see if that helps. One way you could do this is by running some LED strips around the outside of the tank so that they light up the glass. This thread might give you some more ideas too:

Moorish Idol attacking reflection

Added a Moorish Idol into my tank maybe 3 months ago now, knock on wood he's been great so far and made it through QT like a champ. In the last 2 days though I noticed he's starting to constantly attack the left side of my tank, like adamantly fighting with what I assume is his reflection. I...

www.reef2reef.com

If the issue isn't reflection-related, then that would indicate to me that the behavior is being caused by some other kind of stressor (illness being one stressor that could potentially be the cause of it; aggression or environmental issues - in or out of the tank - being some other potential causes). In that case, I'd suggest taking a close look into other possible causes.