The breeders at Garden State Tortoise noticed a Western Hermann's tortoise (Testudo hermanni hermanni) egg that was showing some difficulty in hatching. There were two tortoises inside! That is pretty rare, and even rarer that they were alive.
The tortoises were not conjoined twins, but were still attached to each other through their common yolk sac. The video goes through the process of helping the twins to separate so they can go about their business. Warning: varying sound levels. -via reddit