Wiggiling purple balls?

I can't tell, but it looks like a mass of worms huddled together. When I feed the Black Worms to my fish they huddle together in a ball in the feeding cup.
 
This is bizarre , I love thes Id threads & all the crazy looking critters that show up !
It's always something new for sure. Suddenly I have a different variety of ball anemone that looks really pretty. I always had a ton of the "regular" clear tentacle with white tip varieties, but these guys must be a different animal.
 
I have these too. They look like a little jellyfish and I always assumed they were some sort of hydroid. I seem to have more of them when I feed plankton heavily and they prefer low flow. If I turn up the flow for a few days they tend to go down in numbers substantially.
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

  • Yes!

    Votes: 32 45.7%
  • Not yet, but I have one that I want to buy in mind!

    Votes: 9 12.9%
  • No.

    Votes: 26 37.1%
  • Other (please explain).

    Votes: 3 4.3%
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