Posted: Wed Jun 04, 2008 12:10 am
That could be a bite mark or from the shell irritating the skin. Either way, it looks infected and you should see a vet to get some strong antibiotics for it so it doesn't turn systemic.
In the meantime, start considering separating your turtles, and watch them for signs of aggression. Once fighting starts, there's really nothing you can do to stop it but separate the turtles.
2 RES: Leo (f) and Ezra (m)
1 Russian Tortoise: Godzilla (m)