Thinking about removing an "aggresive" molly - what would happen? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 3 Old 04-08-2009, 06:04 PM Thread Starter
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Thinking about removing an "aggresive" molly - what would happen?

I've got a balloon molly that I would call aggressive. I don't have any known/popular aggressive species so I'm not sure what that typical behavior is, but Chubby goes bonkers whenever there's food in the water... ...or even if something APPEARS to be food.

For a while at first, she would only chase the other molly. Now it's pretty much any one. Beats me if it's just that particular individual, or if it's because she's (evidently) perpetually pregnant. She's already shot out a few fry, but there haven't been any more in a few weeks.

ANY WAY.. to my point. If I removed the dominant fish of the group, would one of the others notice that there's an "opening in the department" and take over like Chubby or would they all be happier and live peacefully together?

3 Platies, 1 molly mut, 1 Siamese algae eater, 2 Neolamprologus Facicula cichlids
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post #2 of 3 Old 04-08-2009, 07:41 PM
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They should all be peaceful. If not add more hiding places like plants, rocks, and drift wood.
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post #3 of 3 Old 04-09-2009, 09:59 AM
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This may be natural behaviour. Unless there is obvious damage being done to the other fish I would leave them together. It is completely natural for most of what we term community fish to chase each other, some more than others, but unless a fish is actually attacking the other fish and they are showing signs of distress and body damage, I would leave them alone to their natural behaviours. Some term this "playful" and in some cases it is connectd with spawning; I have large tanks full of shoaling characins (tetras, hatchetfish, pencilfish) and within each species they are frequently "sparring" as I like to term it, circling around one another at incredible speed, sometimes trying to get other species involved--I honestly think its play. It is certainly normal and I like seeing it because it means the fish are comfortable and satisfied enough with their environment to engage in natural behaviour.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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