You can find very colorful Zoanthids, like this one. I got about 4 polyps (each about the size of pepper corn or ball bearing) and affixed them to the rock with Super Glue Gel. With orange centers and neon green tentacles, they make a real splash of color in your tank. Unfortunately for me, within days my hermit crabs decided they were too tasty and consumed all but one. That can be frustrating because it takes time for new buds to appear.
Photo by Sherita
Another variation of Zoanthids, I nicknamed these "plasma zoos" due to the splash of color in the center of each polyp head. They are growing under VHO lighting, and require no special care. There are probably 100 or more variations with nicknames that are difficult to remember, but hobbyists needed a way to identify what they had when others sought the same.
Another type of Zoanthids, these orange ones remind me of little umbrellas. The green ones to the right were consumed by hermit crabs. Zoanthids are a soft coral that is similar to button polyps or Palythoa. They are good beginner corals, as they don't need special feeding. Good stable water conditions, decent lighting and normal temperatures assure good growth. Make sure salinity stays near 1.026sg, not higher.
Another strain of Zoanthids. These are light green in the center of a white circle, with golden tentacles. The more crowded ones are condensed, while the outer ones are virtually double in size by comparison.
This beautiful red Zoanthids were given to me. Trading zoas with others is a great way to diversify the variety. While it is a small colony in this picture, the color is striking. Once they spread out, it will be a nice splash of color in any reef.
Here is another color of Zoanthids that I got in a trade with another reefer out of state. This is a small fragment of orange zoos that will grow into a nice colony with good water conditions.
Another type of Zoanthid, these have interesting light yellow centers within golden-brown tentacles. I'm slowly acquiring differing types of zoos, which have become very popular in the hobby. They don't demand intense lighting, and don't need to be fed specifically.
These palys are nicknamed Utter Chaos
One of the things you'll often times find in your tank are tube worms. They extend feathery appendages to filter feed particulates from the water, just like the larger Featherdusters that come from Fiji or Hawaii. These two are very small, found at the base of some zoanthids in my tank. They can spread on their own, but usually they arrive as hitchhikers. The larger one on the left creates a hardened white tube that is very easy to see in your rockwork. Reef-safe.