Posted: Mon Jun 30, 2008 4:30 pm
If you've seen fanning, then you have a male. I'm guessing you meant fluttering. You'll see aggression between two females, a female and a male, or two males; two females are usually the least aggressive. There's no real way to limit the aggression, you could assess the resources to see if something seems to be out of balance.
Are they fed at the same time and one is stealing the other's food? You could try feeding them separately in a feeding tank to make sure they both get fed.
Is there enough space on the basking area for both to fit comfortably? You could try adding an additional basking area.
You have a 75 gallon tank, so I don't think a tank upgrade would help necessarily. I don't think it's a space issue.
RES tend to be more aggressive than YBS, so that could be part of the problem. If you post pictures of Frank, esp. the claws and tail opening, we can help affirm that Frank is female. It's possible that the YBS is male and is starting to become sexually mature and pestering Frank, but at 3", you are right to say it's probably too soon.
I don't think the aggression will go away, you could try giving it a few days, but you'll need to be very careful to check frequently to make sure they are both okay. Tenodera on this board recently lost a little RES to another larger RES in a matter of minutes, with no prior aggression.
JAX
- - -
Baby Boy - January 9th, 2011! (3 months old)
1 RES - 7" long - Umi (3.5 years old)
1 black lab/hound mix - Josie (1.5 year old)
2 cats - Mysti and Molly (6.5 years old)