Tropical Fish Keeping - Aquarium fish care and resources

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RabidCookie 05-31-2008 05:26 PM

Odd Tiger Oscar
Howdy doody.
I have a 90 gallon aquarium 4'L 18" with two tiger oscars.

after these last couple weeks after i do a water change they hide in the bottom right corner together utnil the next day. the one "tiger" oscar is extremely peculiar, it has feint markings of a tiger oscar but 99% of the time is straight black with no pattern. frequently when i walk into the room now the fish will be almost bright white, with it's body curled towards the other oscar. would anybody know why my oscar has the ability to change colours? i have seen it purple and green also, but not nearly as incredible as the whiteness, has anybody heard / observed this before?

Gump 06-02-2008 10:12 AM

Have you tested your water? if so what are the results. are you using a conditioner when doing a water change? what is the temp at? When i fish changes colors like that it means the fish is very stressed out, and is if there is no fighting going on its probably from the water quality.

RLHam3 06-02-2008 06:18 PM

oscars (like many other fish) can slightly change color. oscars wil usually change colors when their stressed out. in a 90gal overcrowding wouldn't b a problem for just 2 oscars. check your filter and the water quality. also oscars are smart enough to develop personalities. maybe urs is just a little quirky

bhone20 06-04-2008 12:55 AM

YES!!! I know exactly what you are talking about. My Black Tiger Oscar is normally colored usually. Sometimes, when I gravel Vac the gravel or disturb him, he changes colors quite noticeably, and turns very pale, and sections of his body will turn very lightly colored and others not so much. It is usually when he gets disturbed, angered or when he is attacking his toy (clay pot). At night he changes parts of his pattern too. If the light has been out for a while and I turn it on, He is usually white as a sheet in some parts of his body. It shouldn't have to do with water quality. My Oscar has done this since I've owned him. But, my Albino Tiger Oscar does not change colors that I can see.If anything, the Albino might get brighter orange streaks in the same circumstances . I believe it is normal.A friend of mine has a Red oscar. His changes from light orange-ish colors, to very bright red sides when sleeping or disturbed. It would still be a very good idea to check your water parameters and make a habit of it. It is a good habit to have with Oscars.
How big are your Oscars? how old? Got pictures?

bhone20 06-04-2008 01:37 AM

These are pictures of my Oscar after turning on the light and disturbing him. Their mood has allot to do with their color changing. He is normally jet black.

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