Hello all, first time poster long time reader. I have a tank that’s been established for a year and a half. I have not added anything in the last 8 months outside of a few rockflower anemone (they were not attached to any rock or rubble when placed in my tank). Today I noticed a rather large nudibranch of approx. 1.5 inches. I did add some Berghia about 1 year ago which I have never seen again, this appears different to my untrained eye although what I added were maybe 0.5cm. With its size, I am assuming it’s eating well, my concern is what it’s eating. If anyone can ID this it would be much appreciated. Currently I have left it alone as it is a unique looking creature.



