Leathers
&
Other Soft Corals
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Leathers and other "not necessarily related,
but similar-appearing soft corals"
are corals without an exoskeleton.




They are extremely varied in shape and form, as well as color. Most commonly, they are shades of browns and grays, but there are also many brightly colored types of greens and yellows.

The colors are sometimes a result of the symbiotic zooanthellae (algae) that live within the animal, just like hard corals.   Some, like the "carnations," are brightly colored, but not from zooanthellae.





As with hard corals, the sugary byproducts of the algae's photosynthesis is a valuable food source for the animal.


Above: Carnation (Dendronephthea)
Below: (Dull) Yellow Sarcophyton Leather, with Polyps Extended


In general, leathers are another of the easy "starter" corals for folks who are not expert, long-time reefkeepers. Most of the hardcore reefkeepers, however, have some prized leather corals in their tanks and collections.



They are the perfect visual contrast to the hard corals.
Their names tell much about them: Finger Leather, Yellow or Green Leather, Toadstool, Mushroom or Umbrella Leather, Stubby Finger Leather, Hairy Leather, Rose Leather, Cabbage or Flower Leather, Devil's Hand or Finger, and so on. Get the idea?

There are ones with short stalks and long polyps, short polyps with long stalks, and others without stalks. Some have polyps that are colored in contrast with the main body of the animal.

Above Right: Xenia



While their polyps are retracted they appear smooth, but when they are distended, they often appear nearly fuzzy. It really is neat to see them all smooth when the lights come on in the morning, and watch as they extend their polyps for a day of feeding. They often react quite quickly and extend polyps and maximize size when I feed them my "free invert food." (See our articles.)


Like mushrooms and polyp rocks, most types do very well under less than halide lighting ... a big "plus" in my view. Any of the various reef-type fluorescent lighting will usually be sufficient for keeping and growing them. They often are abundant in lagoons, which are areas of higher turbidity and poorer water quality than the outer reef.

Another neat thing about leathers is that some will be accepted as a host for Clown (anemone) fish (genus Amphiprion) when a suitable anemone is not present. This has been recorded in the wild, not just in captivity in aquaria. Clownfish have spawned in captivity with a leather coral for a host as well!

The most common leathers we see are in the genera Sarcophyton (Toadstool, Mushroom or Umbrella Leathers), and Lobophyton (Ridge, Rose, and other wrinkled types).



Not too long ago I had a conversation with a leather researcher who said that Sarcophyton should actually be split into three genera, so the ones that we all know as "Sarcos" would no longer be classified as such due to the rules of taxonomic nomenclature.

Some very similar looking corals are often sold as leathers, particularly fingery things, such as, Xenia, Lithophyton, Capnella, Dendronepthea, Nepthea, Lemnalia, and others which are "soft corals," but not actually leathers.




Another amazing aspect of leathers is that they can be cultivated by cutting them!  Many people do this by slicing them with a single-edged razor blade, in half, or quarters right down the middle, and each piece will often grow into a new leather, when done properly. WOW!, eh?




Leathers practice chemical warfare, since stinging polyps (aggressive defense) or a hard skeleton (passive defense) are not available options.





They emit chemicals toxic to potential threats, such as other corals trying to horn in on their turf, so it is important to not let them touch, or even be too near other corals. Usually this is a few inches on either side of the fully extended, opened up animal.


Don't be fooled if they appear to shrink in size, which they sometimes do ... appearing to be dying off.



They then often shed an outer layer of "skin," followed by a growth period after which they are larger than before, when you thought it was dying. Some of these chemicals are believed to have or hold potential for being anti-carcinogens - that is they might be cures for cancer. Research is currently underway into this possibility.

Besides size, costs are generally based on color. Bright yellow is more expensive than dull yellow. The Tonga Yellow Leathers which everyone wants when they see them, ship incredibly poorly. Those that do well with them, keep them in bright light, often near the surface, with super high water quality and flow. We do not sell them because we don't believe bringing in 20 of something to get two good ones is something we should be doing. It is one of those items on my "don't wanna sell" list.



In stores, most leathers run from $30 (small brown or gray ones), to $60 (large brown or gray or small-med. colored types). More costly are the fancy, large, or rare types and colors, which may be $100 or more. You must keep in mind the large and colorful types require lots of water for shipping, and at 8.6 lbs. per U.S. gallon and that gets expensive!




Hopefully the photos on this page will help you sort out the types of leathers and maybe help you decide which types you would like to have in your tanks.





Love Your Leathers!

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A couple of related articles ...
Polyps
Mushrooms



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