One male Platy is picking on my two females - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 6 Old 01-20-2011, 10:11 AM Thread Starter
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One male Platy is picking on my two females

Hellooo i wasnt sure if I post in this part of the site or not (I just joined 5 seconds ago lol). Well, I purchased 3 platys for my 20 gallon tank 3 days ago to go along with my 4 ghost shrimp and 1 blue mystery snail. I was trying to figure out what gender my fish are and Im pretty sure I have 2 females and 1 male. Well the male is bigger than the two females which is weird..unless the females arent fully grown yet. The male keeps chasing and nipping at the two females I have...what should I do?? Any tips are appreciated!!
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post #2 of 6 Old 01-20-2011, 10:33 AM
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Hello and Welcome! Lots of great info and friendly people in here! Do you have a few plants in your tank or rock places to hide. "They" suggest plants placed so as to create a barrier to break the line of sight in order give relief to those harrassed. It's harder in a 20G but possible. Not a lot of info on what the sexes look like in the Platy profile to help you, just what water conditions they like. I would start with places to hide while you do more searching. i.e. is the 2 F to 1 M correct? Should they be a group of 5 - 7? How to sex them etc. The LFS (local fish store) does not always know or sell you them they way they should be housed. How long has your tank been set up and has it gone thru it's cycling yet? Usually takes several weeks and often causes fish loss. Good luck!

Every kid, regardless of what they are going through, is ONE caring adult away from being a success story. ~ Josh Shipp, Teen Behavior Expert
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post #3 of 6 Old 01-20-2011, 11:52 AM
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Platies will reproduce like rabbits naturally, and males will actually continue to mate even once the female is pregnant. Males will relentlessly pursue a female, and eventually stress them out. Because of this hiding places are essential.
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post #4 of 6 Old 01-20-2011, 01:54 PM
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Ah, Thank you Bcart1. Good to know I was on the right track. My Swordtail was so upset that she was in the breeding tank she tried to jump and knock the top off 3 times. I finally let her out as it was obviously causing stress and will have to hope at least one baby manages to find shelter in the plants until big enough to venture out. Let nature take it's course.

Every kid, regardless of what they are going through, is ONE caring adult away from being a success story. ~ Josh Shipp, Teen Behavior Expert
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post #5 of 6 Old 01-22-2011, 08:50 AM
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Personally when I get a male platy that constantly chases females into hiding as fast as they try to venture out, I would get rid of him & replace with another,

I've run into it more times then I care to remember,
Peace always returns once the male aggressor is removed.

Those males will usually end up choosing one female as his favorite and she is allowed freedom to swim about unsuppressed.

I've got another case and point right now that i'm going to have to remove the old male.
In my 20 gallon right now I had an original pr of platies, They always stuck together, the male mostly ignoring the other female platies, Just not allowing them within his or her personal space, However I lost the female abit ago and I've noticed the old male start requiring the young girls farther away from him, It's not uncommon to look into the tank and see no movement other them him alone, when one sticks its nose out of hiding he sends them back in a fluster.
I'm going to have to remove him and harmony will immediately return.

However what your describing may simple be the natural events of the mating ritual the male preforms almost constantly for the females attention and favors.

Always in NEED & looking for more Tanks!

Last edited by Chicklet; 01-22-2011 at 08:54 AM.
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post #6 of 6 Old 01-25-2011, 07:06 PM
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when i first set up my 55 gallon last year, i got 3 sunset fire platies from Petco. i was very uninformed on the matter, and got two males, and only one female. the dominant male would attack the smaller male, and constantly harrassed the female, to death. i've heard that for every male, you should have atleast 4 females, or maybe even more.
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20 gallon , fish , platy , red wag

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