Zoanthids come in all types and colors. These are golden in color with a light blue iris, and seem to grow slowly. Zoanthids can be toxic to humans, and cause respiratory problems or worse, so always be sure to wash your hands after handling them. You don't want anything in your eyes, your mouth, or in an open cut. Be smart.
Another trade yielded these rather large Teal Zoanthids, often referred to as Palys. Each mouth is a fine line in neon-green. The individual polyped head is at least 2 to 3 times larger than typical zoanthids. Their proximity to other zoas doesn't appear to cause any chemical warfare.
The blue tang or Hippo Tang is quickly recognized by most anyone these days since movies like Finding Nemo and Finding Dory featured this fish. It's a Regal tang, Paracanthurus hepatus, and I've kept a few over the years. They are fast swimmers, love space, and will seek shelter in the oddest places.
Sundial snails prey on zoanthids, and usually come in on zoa rocks. These snails are easy to spot, and can be removed with forceps.
This is a Zoanthid colony, with the majority of the polyps open. Along the top you can see some closed up polyps as well.
At a club meeting, I was able to capture these beautiful Yellowish Zoanthids - Zoanthus sp. - with my digital camera. There are brown ones off to the right. These are on display in a gorgeous 300+ gallon reef tank at Aquarium Environments in Dallas.
My first zoanthid ever, they were likely the first type to ever get a nickname back in 2002.