aggressive otto..

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aggressive otto..

Postby Necrosis » Sat Jun 30, 2007 4:41 pm

Hiya
Just wondering if anyone had any experience of ottos and fin nipping. I have just watched my otto go for the fins of my 2 pearl gouramis. I have also noticed fin damage to my two black phantom tetras. Could this Otto be the culprit? no other fish seem to have damage. All levels are normal.... Ammonia 0, nitrite 0, nitrate 10-20 pH 6.8.

Nec :(
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Postby Wolfgirl » Sun Jul 01, 2007 1:50 am

I have never experienced an aggressive otocinclus. What fish do you have? :)
Don't let your mind wander. It's too small to be let out on its own.
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Postby Necrosis » Sun Jul 01, 2007 2:41 am

Hi, I have the following bunch....

Pearl Gourami * 2
Dwarf Gourami *2
Zebra Danios * 5
Harlequin Raspbora *5
Black Phantom Tetras *2
Rosy Barb *2

and

Otto *1

I would not have believed it possible for the otto to be the way it is, but I did see it 'attach' itself to one of my pearls. This was at feeding time, I wonder if it could be to do with that?

Nec
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Postby Rockfish » Sun Jul 01, 2007 12:14 pm

Oto's do occasionally show this behaviour (as do some other suckermouth catfish), especially towards 'flat-sided' fish like gouramies. They are trying to feed on the mucus (and anything within it) on the sides of the fish.

Is there plenty of algae in the tank for them? Or if not, sinking foods and veggie food? If they are getting enough food elsewhere, they might stop that behaviour, but some individuals might persist once they've got a taste for it!

Rosy barbs or danios could be more likely candidates for the fin-nipping though...
Sean


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Postby Tigerhair » Sun Jul 01, 2007 12:17 pm

Rockfish wrote:Oto's do occasionally show this behaviour (as do some other suckermouth catfish)


Yep, I experienced this with my angels, and one died. :cry:
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