I have a serpent starfish, cleaning shrimp, an emerald crab, dwarf hermits, a Pom Pom crab, royal gramma, clownfish and a damsel. Could this be a nest of some kind?
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Great to know! ThanksThose are sponges. Harmless filter feeders
Okay thank you!Sponge or a closed up ball anemone. I woudnt worry about either