| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Porpita pacifica Lesson, 1826 |
Raft hydroid | Central Pacific | |
| Porpita porpita (Linnaeus, 1758) |
Blue button | Cosmopolitan in warmer waters | 0.25 |
| Porpita umbela Müller, 1776 |
Southwest Atlantic |