Why has my Panda Cory gone Black?

[lozzyfluff]

HI Anyone !

2 weeks ago I moved my 126ltr tank to a new house! Challenge or what!
But all went well and all fish seem happy.
3 days ago I added 3 small Clown Loach to help control a snail problem. The aquarium shop said the Loach will pick the snails off the plants and glass which they do.
Today I noticed that 1 of my 2 Panda Corys has gone completely black, nose to tip. Is this serious?

Thanks for any feedback!

Cheers
Loz

 

[WILDER]

You do know that clown loaches need a 90gal tank, do you mean the whole body as well, when they darken in colour usually a sign of a bacteria infection.

Also it would be good if you could get a pic of the fish on here.

 

[WILDER]

I don't no if this applies to your fish, but just read this when fish darken in colour or go black, can be that they are angry.

 

[basia]

I can second that - my female ram goes really dark and she's often really angry

 

[lozzyfluff]

thanks for this, the corys do seem a little more agitated than usual since the loaches joined. will kleep eye on it and also for any sign of infection.

thanks

 

[WILDER]

Not the writer of this article.


Color Changes—It is normal for a fish to change colors. They will fade to blend in to a dark background and will often fade at night or when they are under stress, though some fish turn almost black when they are under stress. Colors often intensify at feeding time, or when a fish is breeding or fighting. A brightly colored fish may lose its color over time if the diet is inappropriate. Things to worry about are patches of dark or light coloration (though stress coloration is also a worry if it is prolonged because stress makes the fish susceptible to infections). White patches may indicate bacterial or fungal infections (see milky white or fuzzy white patches). Bacterial infections include illness such as true and false neon-tetra diseases (both of which cause opaque white patches under the skin and are incurable), and Columnaris (see white fuzzy patches). Darkened areas may indicate cancer or damage to the nervous system from injury or parasites.