I tried to research this first, but I didn't find anything. I have a recently aquired (7 days) zooanthid colony (50-70 polyps). I don't know the exact species but they are brown with green centers and connected by very thin purple strands. They looked great when purchased and opened right up in the tank. This morning I noticed about 10 polyps in different locations of the colony that almost look like something bit the top off of them. They are not just closed. They have a little flesh on top remaining that kind of looks cauterised but is unrecognizable as a polyp. The affected ones are fairly spread out, however all the unaffected polyps in the immediate area around them are closed.
The only (known) tankmates are various mushrooms (closest are 6-7" away), a mated pair of percs, a yellow tail blue damsel, a coral-banded shrimp, and a few astrea snails and 1 blue leg hermit. They all appear normal.
The tank is a 20 gal with live sand, about 10 # of live rock, parameters are all normal and stable (for this tank) - ph 8.3, alk 6 meq/l (always this high) SG 1.0245, temp 80-83, no measurable nitrogens, tank has been up and very stable for over a year.
I am doing an immediate water change, and I am thinking of cutting off the affected polyps. Sorry, I don't have a digital camera to take a pic.
Could anyone hazard a guess as to what could be happening?
:?
The only (known) tankmates are various mushrooms (closest are 6-7" away), a mated pair of percs, a yellow tail blue damsel, a coral-banded shrimp, and a few astrea snails and 1 blue leg hermit. They all appear normal.
The tank is a 20 gal with live sand, about 10 # of live rock, parameters are all normal and stable (for this tank) - ph 8.3, alk 6 meq/l (always this high) SG 1.0245, temp 80-83, no measurable nitrogens, tank has been up and very stable for over a year.
I am doing an immediate water change, and I am thinking of cutting off the affected polyps. Sorry, I don't have a digital camera to take a pic.
Could anyone hazard a guess as to what could be happening?
:?
