Wrasse and it's reflection

[Burrito1]

So today I cleaned the glass of my tank and tonight I noticed that my sixline wrasse seems as if he is fighting his reflection. He opens and closes his mouth and his spiked fins stick out as he tries to bite the reflection. Has anyone had this happen before? Very strange behavior.

 

[Len]

Ya, with happened with my tangs and angels, but they give up after some time.

 

[Anonymous]

It's quite common among many fish species Burrito, especially at night when the inside of the tank more or less turns into a mirror for them. It's not really strange behavior, they see a competitor and act accordingly.

 

[Burrito1]

Good, I was scared he might be getting sick or something because his colors changed as well.

 

[Unarce]

After two years, mine still does it. However, I can't tell anymore if it's because of it's shadow, or if it just doesn't like me standing there