Is this a bite mark????

[Drumm22]

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?

21-30%

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.

Just put African butterflies and knife fish. Is it possible one tried to chomp this guy?

 

[krichardson]

So,what's your water change routine?....couldn't resist lol.
The photo isnt the clearest but that could be a bite wound from a relatively small knife fish,most of them have small mouths to begin with.
I suspect that a butterfly would cause a bigger gash.

 

[fishhead0103666]

Given that the butterfly fish has a trap door style mouth I would expect him to just swallow the danio if big enough or leave a scrape across the body. But that just my $0.01

 

[krichardson]

Given that the butterfly fish has a trap door style mouth I would expect him to just swallow the danio if big enough or leave a scrape across the body. But that just my $0.01

Yeah,I don't recall seeing a butterfly fish that wasn't big enough to engulf a danio lol.

 

[kno4te]

Don’t look like a bite mark. What type of knife fish?

 

[Drumm22]

Don’t look like a bite mark. What type of knife fish?

IDK they r like 3/4inch greyish/blacjk

 

[Drumm22]

So,what's your water change routine?....couldn't resist lol.
The photo isnt the clearest but that could be a bite wound from a relatively small knife fish,most of them have small mouths to begin with.
I suspect that a butterfly would cause a bigger gash.

I
I take 10gal out every week of the tank. 30gal tank. I do have an EBJD in there too. Like 2.5 inchea

 

[Drumm22]

Yeah,I don't recall seeing a butterfly fish that wasn't big enough to engulf a danio lol.

The one is relatively small

 

[Drumm22]

View attachment 1414303
Just put African butterflies and knife fish. Is it possible one tried to chomp this guy?

He had no mark yesterday morning, put the 4 fish in yesterday afternoon. Woke up and there's that mark

 

[tlindsey]

It's possible the African Butterfly bit it at a angle but released the Danio. The Danio may get caught again if it stays at the surface.