Now that I'm looking at it from my PC and not my phone, that would be a long tentacle. Sometimes the phone is just too small for my eyes.
When it comes to feeding anemone, I never personally suggest it. It can be stressful for anemone to eat when they try to consume something too large. They have the ability to get what they need from your lighting and by randomly catching some food when you feed your fish. No reason to directly feed.