Need an ID for this little guy

[FIRSTSALT]

I started my first Sw reef tank and have had it going for about a month and half now and just noticed these little puff ball looking things on my LR I have six of these now growing and have no idea what they are please help.

[Cas]

Pic is a little fuzz, but it is either a sponge or a sea squirt. Should not be problem.

[FIRSTSALT]

Sounds kinda exciting I guess, are these a good sign that my tank is going in the right direction

[Ninong]

It's hard to tell from your photo but it could be a juvenile tunicate (sea squirt). Is there a side opening (exhalent siphon) similar to the top opening (inhalent siphon) that is visible in the picture?

[FIRSTSALT]

I will try to get better pics tomarrow evening and will the get any color to them or are the just plain and boring

[Ninong]

If they are tunicates, they come in a variety of colors. Obviously yours are sort of plain and colorless. Chances are they won't last very long anyway.

[weez1959]

Yup, looks like a sea squirt to me too, I had a ton of these in my tank a little while back and they just slowly disappeared.