Christmas Tree Hydroid
| Name: | Christmas Tree Hydroid |
| Scientific Name: | Pennaria disticha |
| Family: | Hydroids |
| Scientific Family: | Pennariidae |
| Source: | WoRMS AphiaID 117802 |
| Size: | up to 3.5 in. |
| Depth Range: | Various depths (0 – 130 ft.) |
| Sightings: | Seen often |
This Hydroid has branches that grow in an alternating pattern from a central stalk, resembling the shape of a Christmas tree. White polyps are visible at the tips of the branches and along the stalk. It is commonly found in clusters.