Emperor snakehead biting its own tail

[Kavee mfk]

Have you tested your water?

No

If I did not test my water...

1. ...I recognize that I will likely be asked to do a test, and that water tests are critical for solving freshwater health problems.

Do you do water changes?

Yes

What percentage of water do you change?

11-20%

How frequently do you change your water?

Every week

If I do not change my water...

1. ...I recognize that I will likely be recommended to do a water change, and water changes are critical for preventing future freshwater health problems.

Hi Guys,
My emperor snakehead (channa marulioides is biting its own tail. How can i prevent it ? Now it's more than a month

 

[puffers4puffers]

Sounds like a neurotic behavior
I had a SW Coris wrasse that would swim about the tank and then chase it’s tail for a circle or two and then swim about again

 

[carnicana]

Cover each side of the aquarium with glass, in the hope that the fish will respond and forget about tail biting

 

[kno4te]

Any tankmates?