Christmas Tree Hydroid GALLERYHalocordyle disticha
This hydroid is so named for it's flat Christmas tree shape. There may be more than one hydroid with this shape. At the end of each branch is a white polyp that contains stinging hair-like polyps. They grow in small clusters in cracks and crevices or on top of rock outcroppings. Small clusters measure up to 6 inches across at depths of 2 or more feet. Polyps are mildly toxic. If you get stung --Visit the "Remedies" page.