Weird Hitch hiker ID please

SpencerReef99

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Hey everyone,

Just recently set up a new reef tank with some live rock and noticed this little guy. Shaped almost like a virus cell or an egg sac, you can see it has attached itself to the rock with multiple tendrils to hold it in place, does anyone know what this is? Maybe a sponge? If you cannot see it, it is located near the center of the image, slightly up and left.

Thanks in Advance

 

Freshwater filter only or is it? Have you ever used an HOB filter on a saltwater tank?

  • I currently use a HOB filter on my reef tank.

    Votes: 56 25.2%
  • I don’t currently use a HOB filter on my reef tank, but I have in the past.

    Votes: 57 25.7%
  • I have used a HOB on fish only or quarantine tanks, but not on the display tank.

    Votes: 53 23.9%
  • I have never used a HOB on a saltwater tank.

    Votes: 52 23.4%
  • Other.

    Votes: 4 1.8%
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