What think? Aiptasia or a benign other type of anemone? Came in on live rock that I got last week.
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Keep an eye….I see 3-4 Aptasia.Thanks, all. Joe's Juice directly into the oral disc and it's now...gone.
Yeah, I see what you mean...didn't notice it until you pointed it out. It's about at 11 o'clock from the original one if it was at 6 o'clock. It has a different color now that the lights have come on (the tentacles are orange) and it doesn't have a (visible) stalk (which may mean the stalk is down a rock hole, I guess). I was thinking it was a Hidden Cup coral. It doesn't have the stringy aiptasia tentacles--they look more rounded at the end. Should I not risk it and just take it (and others like it) out? In my other tank I have hitchhiker non-aiptasia anemones and Hidden Cup corals which have been well-behaved for years--they keep growing but haven't split off and spread at all...so I like them.Keep an eye….I see 3-4 Aptasia.
If there’s one, there’s two, where there’s two, there’s four.

For me, I adopt the “when in doubt, take it out” approach to be safe.Yeah, I see what you mean...didn't notice it until you pointed it out. It's about at 11 o'clock from the original one if it was at 6 o'clock. It has a different color now that the lights have come on (the tentacles are orange) and it doesn't have a (visible) stalk (which may mean the stalk is down a rock hole, I guess). I was thinking it was a Hidden Cup coral. It doesn't have the stringy aiptasia tentacles--they look more rounded at the end. Should I not risk it and just take it (and others like it) out? In my other tank I have hitchhiker non-aiptasia anemones and Hidden Cup corals which have been well-behaved for years--they keep growing but haven't split off and spread at all...so I like them.