sertularian
/sɜrˈtʃʊləriən/
noun
- A type of colonial marine hydroid (a small, plant-like animal) of the genus Sertularia, often found in shallow waters.
- Marine biologists study sertularians to understand coral reef ecosystems.
- The tide pool was full of sertularians, looking like tiny ferns.
- A sertularian colony can have hundreds of individual polyps.