Introduction to caring for the Toadstool Leather Coral
The toadstool coral is a perfect beginner coral for the saltwater aquarium. They are saltwater reef soft coral and require the conditions typical for success with just about any reef tank. Toadstool leather corals are often sold as different varieties, based on their colour or the size of their polyps. Long polyped, short polyped, green polyped, and Yellow Fiji Leather are three commonly available varieties of toadstool coral
Care requirements in a saltwater aquarium
The toadstool coral is ideally suited to life in a saltwater aquarium. You’ll note that the requirements for care are directly in line with what you would expect with a reef tank.
Temperature: 22-25.5 Celsius
Specific gravity: 1.023-1.025
Water flow: Moderate
They get most of the nutrition they need from light. They have photosynthetic dinoflagellates, called zooxanthellae, that live inside of them and convert the light from your aquarium into life-sustaining sugars through the process of photosynthesis. They are also thought to absorb nutrients directly from the water.
Why are they called Toadstools?
The Toadstool coral gets its name from the resemblance smaller frags have to toadstool mushrooms.
A Toadstool coral has a long stalk and a small mushroom cap-like top (called a capitulum).
As the cap grows larger, it folds and looks a bit like a carpet anemone.
When the polyps are fully extended, toadstool leather corals almost have a fuzzy appearance. Every night, and a few times during the day, the toadstool will retract its polyps, revealing a smooth surface.
Toadstool coral is found from the Fiji islands through the Indian Ocean.
Natural habitat of a toadstool leather coral
Most often, they are sunning themselves in shallow water flat reefs or lagoons, in reefs that are mixed with both soft and hard corals. Shallow water reefs are generally pounded with high-intensity light–so while we often consider this coral to be a moderate-to-low light coral in the aquarium world (because they are tolerant of lower levels of light than many corals), there is no reason to shy away from the beautiful toadstool leather coral if you have a high-intensity reef setup.
Don’t be fooled by the size of a tiny frag. I grew a toadstool coral from a frag the size of a penny to a colony with a cap that was at least 10 inches in diameter.
Toadstool coral care: Compatibility
Toadstool corals don’t have any stinging cells or sweeper tentacles, so in a mixed reef aquarium, they are generally peaceful tankmates. They do produce more than 50 chemicals, at least some of which are thought to have a negative impact on the growth of some small polyp stony (SPS) corals. Even though they come from mixed reefs living alongside stony corals, this is sometimes reported as a problem in the confines of the home aquarium.
These are not particularly fussy corals. They will do well in multiple areas of the tank. The best general advice is to keep them in areas of moderate flow and light. Not too high, not too low.
Just know they don’t need the prime real estate you might otherwise reserve for your SPS corals and may struggle in the twilight or darker regions of the tank that you might otherwise reserve for non-photosynthetic sun coral polyps but will do well in the ~60-70% in between.
Surrogate Anemones for Clownfish
Toadstool corals can make great anemone surrogates for clownfish. Clownfish are needy houseguests. Once bonded, they seem to need constant contact with the polyps and will also clean and peck at the polyps. Toadstool leather corals, in my experience, are fairly tolerant of all this attention.
Some of the polyps will retract away from all that clownfish love, but I have had a pair hosting in a toadstool leather happily for several years now. However, there are also reports that clownfish may irritate the coral so much that it eventually perishes.
It is important to watch the behaviour together to ensure they are growing happily with each other. The clownfish in my tank have actually tried to lay eggs on the toadstool leather coral itself–which was not an effective strategy. The eggs didn’t stick.
You can see the ovipositor from the female coral in the picture below. it’s the blurry (sorry about that, bad photo) white triangle sticking out below the white stripe in the middle of the body. She rubbed and wiggled all over that poor coral for hours trying to get the eggs out and eventually laid a few on a nearby rock.
Is my toadstool coral sick?
From time to time, a toadstool coral will retract its polyps, clam up, and release a stringy, gross-looking mucus slime. It is thought to be a way of removing detritus, algae, and other particles from the surface of the coral. Most times this is harmless, but it can be an irritant to other corals.
They can also make tiny clones of themselves by dropping off tiny bits of the cap or dropping off a small bud from the side. Toadstool buds luckily for us, these corals are also great candidates for fragging. Just about any small piece of the coral is capable of forming an entirely new full-sized colony.
The scientific name for the Toadstool coral is a bit tricky because it is quite challenging to tell different species of toadstool corals apart.
Most of the time, I see this genus represented as Sarcophyton sp. Sarcophyton is the genus, but since the species name is not actually known, it is generally abbreviated with the sp. In the case of the Yellow Fiji Leather, the species name is known and can be appropriately referred to as Sarcophyton elegans. Toadstool leather corals are octocorals, or octocorallians–which is a fancy way to say their polyps have 8 tentacles.