| Answer | Crossword Clue |
|---|---|
| REDALGAE | Marine organisms with a purplish pigment |
| hydrozoan | any coelenterate of the class Hydrozoa, comprising organisms that are mostly marine and colonial with polyp and medusoid stages in the life cycle also HYDROZOON |
| hydrozoans | HYDROZOAN, any coelenterate of the class Hydrozoa, comprising organisms that are mostly marine and colonial with polyp and medusoid stages in the life cycle also HYDROZOON |
