My cometfish has recently been 'unwell'. In the last week or so she has hardly eaten anything. She is swimming as if lethargic and stays towards the edges of the pond - she keeps to herself. Upon closer inspection, she has yellow jelly blobs on her anus - please see attached photo. I wouldn't have thought she is pregnant. We have had her for atleast 10 years. I did a water test a couple of weeks ago and found nitrites were slighty higher than usual but remedied this immediately. I have put on Medifin in for a couple of days.