- Kingdom: Animalia
- Phylum: Cnidaria
- Class: Hydrozoa
- Subclass: Hydroidolina
- Order: Anthoathecata
- Suborder: Aplanulata
- Family: Tubulariidae
- Scientific name: Tubularia indivisa
- Norwegian: blomsterpolypp
Characteristics:
Hydroid stage: Yellow stem without branches, with a single polyp on the top. The stem is usually 3-15 cm long. The 20-30 tentacles constituting the outer ring, may reach a length of 2 cm. A large number of small tentacles form an inner ring around the pale pink polyp. It may be confused with the ringed tubularia.
Medusa stage: There is no medusa released from the hydroid.
Habitat:
It seems to prefer current exposed locations with rocks and boulders.
Distribution:
This hydroid is well known along the coasts of Europe, from the Mediterranean to the Arctic.