What color is the base ? If it's orange then it's an LTA and they don't split if it's not orange then it's a Ritteri Anemone and they are known for splitting in captivity when under severe stress. What are the dimensions of the tank ? What type of lighting are you using and how many watts ? What are your parameters ? How long have you had this Anemone ? I don't know if it's the quality of the photo or what but that Anemone looks to be very light in color and could be an indication that it may have expelled some of it's zooxanthellae which is not good !