Guardian Nature School Team Contact Blog Project Noah Facebook Project Noah Twitter

A global community of nature enthusiasts
photographing and learning about wildlife

Join Project Noah!
nature school apple icon

Project Noah Nature School visit nature school


Pennaria disticha / Halocordyle disticha


Animalia Kingdom Phylum: Cnidaria Class: Hydrozoa Order: Hydroida Family: Pennariidae Genre: Halocordyle Species (s): disticha This species forms colonies in the shape of a feather, with regular branching. The general color is light due to the whitish tone of the polyps, although the structure of the colony is beige or dark brown. They measure up to 25 centimeters in height. The polyps are oval and pear-shaped and widely spaced on the surface of the branches. They have a crown of between 10 and 18 filiform tentacles. With the stinging cells of these tentacles it catches the small plankton on which it feeds.


It inhabits shallow rocky edges, in areas of strong hydrodynamism, and cave entrances, well attached to the substrate. Island in mediterranean rocky area. Isla Plana (Murcia).


Its life cycle has two reproductive phases, one asexual and the other sexual through free-living jellyfish, with external fertilization. In one day, the embryo transforms into a free-living planula larva, which can eventually attach to the substrate and be the origin of a new colony.

Species ID Suggestions

Sign in to suggest organism ID


Leuba Ridgway
Leuba Ridgway a year ago

Well deserved SOTW -Congratulations Eulalia !

Saturniidae27 a year ago

Congrats Eulalia :-)

Neil Ross
Neil Ross a year ago

Congratulations, Eulalia. A wonderful STOW.

DrNamgyalTSherpa a year ago

Congrats Eulalia for the STOW!

Brian38 a year ago

Congrats, Eulalia.

Ornithoptera80 a year ago


Amazing spotting Eulalia,congrats on the well deserved SOTW and thanks for sharing

MichaelS a year ago

Hi eulalia rubio,

Your Hydrozoan spotting has been voted Spotting of the Week!

Mark Ridgway
Mark Ridgway a year ago

Your spotting has been nominated for the Spotting of the Week. The winner will be chosen by the Project Noah Rangers based on a combination of factors including: uniqueness of the shot, status of the organism (for example, rare or endangered), quality of the information provided in the habitat and description sections. There is a subjective element, of course; the spotting with the highest number of Ranger votes is chosen. Congratulations on being nominated!

Deny a year ago


Leuba Ridgway
Leuba Ridgway a year ago

I always assumed that they were sturdier. Sodelicate and beautiful - thanks for sharing Eulalia.

SukanyaDatta a year ago


eulalia rubio
Spotted by
eulalia rubio

Cartagena, Región de Murcia, Spain

Spotted on Aug 20, 2020
Submitted on Aug 20, 2020

Noah Guardians
Noah Sponsors
join Project Noah Team

Join the Project Noah Team