Gattya humilisGattya humilis, the snowdrop hydroid, is a delicate colonial hydroid in the family Halopterididae.DescriptionSnowdrop hydroids are usually white and have small branches extending from a central stem. They may grow up to 3 cm in total height. The male gonophores are smaller and more rounded than the female ones, which are goblet-shaped and contain only one egg each. Both sexes occur on the same stem.DistributionThis colonial animal is found off the southern African coast from Northern Namibia to KwaZulu-Natal from the subtidal to 70m under water. It is only found in this region.EcologyThis species often grows on coralline algae or weed.