Can anyone identify please?

[Alb920]

Tank is two years stable.
Temp: 78-79
Sg: 1.025
Mg: 1330ppm
Ca: 420ppm
Alk: 8dKH

 

[AlSimmons]

They look like Tunicates IMO. (good)

 

[Ron Reefman]

Al, I thought the same thing, but I was so unsure I didn't offer an opinion.

 

[JoeyH08]

How big is that? It looks really cool.

 

[Ron Reefman]

How big is that? It looks really cool.

I don't know for sure (maybe Alb920 will tell us for sure), but my guess is it's 1" to 2" total diameter.

Tunicates are strange critters. Kind like a sponge and yet kind of like a coral or an anemone depending on which one you see. Like most sponges, almost all tunicates are very, VERY difficult to keep alive in an aquarium.