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Old 02-13-2013, 11:04 AM   #1 
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Join Date: Jan 2013
Betta aggression and bubble nests

I just put my VT betta, Pilly-Willy, in his new tank about a week ago and he seemed very happy once I sorted out some filter issues. He usually blows bubbles but today when I got up he had built a nest.

I was just wondering if bettas try to protect their nests even if they have no eggs. I have two apple snails in the tank as well and they are quite small at the moment, and he is curious about them and inspects them and then moves on.

Today however, the two snails were under the nest and when one rolled over and exposed his fleshy part Pilly Willy attacked him and kept on attacking until the snail hid in it's shell again. I have removed the two snails for now and will reintroduce them when they are a bit bigger.

Also he bit me aggressively about a minute later, usually he nibbles me because he expects that food is coming but he darted for me like he did with the snail and it was a hard bite.

Is he just having a bad day or was he trying to protect his nest. He has never built a full nest before and I would like to know for future so I don't disturb him too much when he is moody ^_^
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Old 02-14-2013, 07:39 PM   #2 
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Join Date: Sep 2012
Location: Red River, NM
Yes, they will protect their bubble nests, and will attack if they feel something is threatening it. You can probably put the snails back in there, as long as they are big enough that he can't eat them.
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Old 02-16-2013, 06:08 AM   #3 
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That's great thanks for the fast response.
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Old 02-16-2013, 11:59 AM   #4 
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Join Date: Oct 2012
Location: Massachusetts
My betta definitely became more aggressive when he built a nest under an Anubias leaf one time. He would attack all the Cory's that came to that half of the 10 gallon tank.
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Old 02-16-2013, 12:32 PM   #5 
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Yeah he has calmed down a bit since I destroyed most of the nest (not on purpose - necessary water change). I thought they would just protect it if it had eggs in it so I was surprised by his behaviour ^_^
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