Obelia geniculata

Obelia geniculata
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Cnidaria
Class: Hydrozoa
Order: Leptothecata
Family: Campanulariidae
Genus: Obelia
Species:
O. geniculata
Binomial name
Obelia geniculata
(Linnaeus, 1758)

Obelia geniculata is a species of cnidarian belonging to the family Campanulariidae. Its common name is the Knotted Thread Hydroid.

The species has cosmopolitan distribution.