Is this fin rot?

[MV17]

I just noticed this on my dartfish today all my other fish’s fins seem fine could it be fin rot or something else?

 

[vetteguy53081]

I just noticed this on my dartfish today all my other fish’s fins seem fine could it be fin rot or something else?

Looks more like aggression or an injury causing a tear but something a clown or other goby would do

 

[MV17]

I have two clowns and a diamond watchman goby! Is this going to become a problem or is it more of a one off?

 

[Jay Hemdal Verified Community Expert]

I have two clowns and a diamond watchman goby! Is this going to become a problem or is it more of a one off?

You just need to monitor the damage - there is no way to tell in advance if the aggression will get worse, level off, or get better. Sometimes, in small tanks, a tank divider can help.

Jay

 

[vetteguy53081]

I have two clowns and a diamond watchman goby! Is this going to become a problem or is it more of a one off?

Set your cell phone on video mode for about 40 mins and drop a little food and walk away - YOU MUST walk away as they know youre there. Often the aggressor is a bully at feeding time.
Review the video and see who it may be and you will then have to isolate the aggressor or make a decision who should go