View Full Version : ID Assistance Needed for SPS Encrusting Coral


JeffDubya
10-09-2007, 12:46 AM
So... I am on a mission. I want to determine what an otherwise unknown species of coral in my SPS prop tank is. Unfortunately, I don’t have much information to go on, and the photos I have taken are just about as good. Sorry, I need a macro lens.

When I originally aquired this species, the person who sold it to me broke a chunk off of a rock. He was trying very hard to keep it intact, with little luck. It pretty much shattered. He told me he didn’t know what it was, but he was told that it was supposedly rare.

I have scoured the Eric Borneman and Julian Sprung corals books. I have come up with nothing. Same for the web. Well, not quite nothing, but pretty darn close.

Here’s what I can tell you. This SPS coral is very much like montipora. So I am totally guessing it is some kind of Acroporidae. Of course, that doesn’t mean much, and eve if I am right, we’re talking about thousands of possible species.

How is it similar? Well... it’s an encrusting coral with extruding polyps. The polyps are much denser and smaller than any montipora I have personal experience with. It grows the same way as montipora, but possibly quicker. it seems to layer itself. What does this mean? I glued a small chunk to a frag disc. The way it is growing now looks almost like the chunk melted. There is clear growth on the disk, but it is very thin. As time goes by, it gets thicker. This may also be a result of the small polyp size.

I also believe that the coral being so brittle is also a result of small polyp size. If you imagine the coral skeleton generated by this thing, the more polyps, the more holes. The more holes, the more porous it is. The more porous, the less structrual integrity there is.

I took five nickel-sized chunks and glued them to a rock. The growth has really been good. the pieces no longer look like they have jagged edges. They have grown out so that the frags are all smooth on the rock and they are quickly moving toward each other. I really believe that within 30-60 days (sooner if I get my calcium reactor up and cooking) all the pieces will have fused together.

Okay, so earlier I said I had found “pretty darn close” to nothing in my research. Here’s what I found...

I found a coral called “Leptoseris mycetoseroides.”

http://www2.aims.gov.au/coralsearch/html/201-300/Species%20pages/228.htm

A lot of the descriptions, of course, are meaninglesss because they are working on the macro, but I am working with the micro. Unless I let this thing grow out for years, I might never see some of the described growth patterns. This photo, however, seems to be have some similarities to me.

http://www2.aims.gov.au/coralsearch/images/201-300/Large/228-05.jpg

Now, I did say this seems to be an encrusting coral. And in this photo, it looks like the coral is more of a plating varitety. However, I have several plating montiporas that, when they run out of something to grow on, they plate outward. Just a thought.

I also saw a coral in the Borneman book.... Pavona clavus, on page 251. The guy I got the coral from agreed that this has some striking similarities.

OK, so let’s talk about my crappy photos.

In unknown-1sm.jpg you can see the rock with all the frags glued to it. Not much good for anything but possibly the color and shape of the coral.

In unknown-2sm.jpg there are two things to look at (you can see the larger colonies in the background) First, in the foreground there is a rock with two additional frags glued to it. You can see how the sides are all nice and rounded off now with new growth. You can also see a good example of what these critters look like with full polyp extension.

In the background is a ceramic frag disc that I glued one little chunk to. You can clearly see the “melted” look of this coral as it grows out onto the disk. Nothing substantial, but growth regardless.

I have larger versions of these photos I am happy to send anyone who feels they can help make a positive ID on this coral.

SoCalReefer
10-13-2007, 01:25 PM
The second one looks like a Montipora sp. from Fiji to me, maybe nodosa or damicornis? The first picture is kinda fuzzy to me, but it's shape looks like a Montipora crassituberculata, if the polyps resemble those of other Montipora sp. but are distictly smaller it may be that.

JeffDubya
10-13-2007, 01:52 PM
They are both frags from the same parent colony...

SoCalReefer
10-13-2007, 06:05 PM
...take better pics, but it looks like a montipora sp. i was too lazy to read your frag summary and just looked at the pics

JeffDubya
10-14-2007, 02:06 AM
Sorry, as I said I don't have a macro and those were the best shots I could get.

JeffDubya
10-22-2007, 12:24 AM
SoCal... just wanted you to know that after spending as much time as I have with this over the past two weeks... I have decided you are 100% correct. The polyp structure of the coral in #2 is not the same as #1 - So I will be looking up your references to try to figure out what *it* is now. FWIW the coral in picture #2 looks like montipora to me. One I have found that is similar is montipora peltiformis, but that is supposedly yellow with purple polyps. This is not yellow, but green instead. However, the polyps have a blue/violet cast to them.

As far as coral #1, it turns out to be Psammocora superficialis

thecoralreefer
10-22-2007, 12:12 PM
I am curious if the skin is a green blue?
I had a milli come in on a rock from a customer and it took about 8 mnths for the spires to start forming.
It had the same growth pattern at first it was flat and encrusting,
Then the spires started coming out from all around. I about a yrs time it had formed several and growth had startd upward. Brown polyps w/ a blue green skin. I don't know point of origin but it sure was a cool piece.
Sold it and rock for 85.00.

JeffDubya
10-22-2007, 12:53 PM
Which one? I am assuming you are referring to the Psammocora superficialis...

The polyps are very small and don't have a contrasting color. Much different than a milli, much more dense in nature, almost like a fur than anything. and Psammocora superficialis apparently doesn't make spires, it's an encrusting coral that occassionally have the "appearance" of stunted columns and ridges. This from Borneman.

Of course, the one thing I have learned through this process is put the same coral in 10 different tanks, with 10 different sets of water variables, and you are likely to get 10 very different growth patterns...

See the photos above for pretty accurate colors, although the more time that goes by, the greener the Psammocora superficialis is becoming.

JeffDubya
10-22-2007, 12:54 PM
FWIW, most Psammocora species are thought to be rare in the aquarium trade. I am not sure why. They are both fast growing and hardy, maybe just not as attractive as acropora or something. I dunno.

JeffDubya
10-23-2007, 05:42 PM
I think it's some kind of porites