"The tiny flowers of the reef," Zoanthids (also
referred to as colonial anenomies, button polyps
and commonly as "zoos" or "zoas")
are among the hardiest of all reef aquarium species, but nonetheless remain
a constant favorite of reef aquarium hobbyists for their wide range of
colors as well as their propensity to grow into thick colonies that provide
a lush and vibrant coverage for live rock (and sometimes even aquarium
glass or unsightly reef tank hardware such as flow devices including powerheads).
For a long time, the only zoanthids that were available to keepers of
reef tanks were drab brown and common green- but thanks for advances in
aquaculture (captive rearing) and propagation
techniques (fragging), zoanthids are now available in color varieties
including wild electric blues, stunning neon oranges, peaceful pastel
purples and alarming deep reds.
While hobbyists keeping SPS corals are sometimes hesitant to place zoanthids
in their collections, regular care and propogation can help to make these
beautiful creatures a successful addition to your reef aquarium livestock.
The hesitation is not entirely unfounded, as zoanthids are an
invasive species, growing on any surface on which they can establish
themselves, sometimes even including other living creatures such
as SPS corals and clams. But, a wise reef aquarium hobbyist will
quickly understand that they can easily benefit from the growth behavior
of zoanthids. By locating zoanthids in areas shaded from intense metal
halide aquarium lighting, all areas of a reef tank can be filled with
color and interesting reef species.
Taking advantage of their aggressive colony forming behavior, atruly
entrepreneurial reef hobbyist will select only rare zoanthids in prized
colors (blue zoanthids are currently among the most treasured of all reef
aquarium corals) and propagate them. "Fragging"
zoanthids is accomplished by placing small pieces of live rock adjacent
to successful zoanthid colonies and allowing them to spread. These zoanthid
frags are often then given away to friends or fellow reef tank
hobbyists, traded for other colors to increase the range of colors in
reef tanks, or even sold online or at local "frag swaps."