My spiny softshell turtle is 24+ years old. Her shell is 10" long. Recently, she is acting ill. She has been biting and killing goldfish but not eating them or anything else. She has developed a black blotch on the back of her neck.

At a reptile store, the manager thought the blotch to be more of an abrasion than a fungus. He also noticed that her back 'toes' had some abrasions. She has been in the same water filled aquarium for many years with no problems. My turtle is now lethargic and barely moves in or out of the aquarium. She used to walk around in the backyard but now hardly any motion.

Does anyone have any thoughts on helping my turtle, Myrtle?

Thank you