The Percula Onyx Clownfish has the traditional orange body with three white stripes. In the Percula, the black margin around the white stripes is very thin or absent. They also have a different number of spiny rays in the dorsal fin. The Percula Onyx Misbar will have incomplete white bars.
These clownfish do not need an Anemone to survive, but will accept many different Anemones as its host, including corals. Their favorite Anemones to call home are the Carpet Anemones Stichodactyla Gigantea or the Magnificent Anemone Heteractis Magnifica.
Clownfish have a very distinct swimming motion that is different from most fish. This is likely passed on through their genetic makeup from centuries of wiggling within the tentacles of Anemones. As the Clownfish wiggles within the stinging tentacles the Anemone's mucus is likely smeared over the Clownfish's body, which then protects it from additional stings.
In the wild they live in small groups with one large dominant female, one smaller sexually active male, and a handful of smaller males and juveniles. When the female is lost the largest male will then change sex and become the dominant female with the other Clowns moving up the ladder behind it.