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Star ascidian. Ascidia estrella

Botryllus schlosseri


The ascidian of size small usually associated in colonies that can reach large area. In the colonies may have degrees and divide the work: breathing, digestion ... They are basically sessile filter feeders; the water enters with food for oral siphon, it passes through a perforated pharynx where the food is retained and then goes to a cavity what communicating with the exterior by the atrial siphon. They live in shallow water. The star ascidian forms flat colonies embedded in some object such as plants, rocks, animals, artificial structures, etc.. They are formed by 3-12 individuals of 2 mm high, arranged such daisies or star-like around a common exhalent siphon. ---------------------------------------------------------------------------------------------------------------------------------------------------------------- Las ascidias de pequeño tamaño suelen asociarse en colonias que pueden alcanzar gran superficie. En las colonias puede haber grados y se reparten los trabajos: respiración, digestión... Básicamente son organismos sésiles filtradores; el agua entra con alimento por el sifón bucal, se introduce en una faringe perforada en la que queda retenido el alimento y después pasa a una cavidad que comunica con el exterior por el sifón atrial. Viven en aguas poco profundas. La ascidia estrella forma colonias planas que se incrustan en algún objeto como: plantas, rocas, animales, estructuras artificales, etc. Están formadas por 3-12 individuos de 2 mm de alto, dispuestos de tal forma que parecen estrellas o margaritas alrededor de un sifón exhalante común.


Shallow waters of the lagoon Mar Menor (Murcia).------------------------------------------------- Aguas someras de la Laguna del Mar Menor (Murcia). -----------------------------------------------They often grow on the leaves of Cymodocea nodosa, as in this case, a marine plant -not algae. ----------------------------------------------------------------------------------------------------------- Generalmente crecen en las hojas de Cymodocea nodosa, como en este caso, una planta marina (no algas).

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Ingrid3 3 years ago

Wow eelgrass size! nifty

eulalia rubio
eulalia rubio 3 years ago

Thanks, Saturniidae27

eulalia rubio
eulalia rubio 3 years ago

Thanks, SukanyaDatta.

Tukup 3 years ago

Felicitaciones Eulalia por haber sido seleccionada para el SOTD. Bien hecho.

eulalia rubio
eulalia rubio 3 years ago

Thanks, Michael Sarill. It is a pleasure to receive this award.

Brian38 3 years ago

Congratulations, eulalia rubio on a well deserved SOTW!

James McNair
James McNair 3 years ago


Ornithoptera80 3 years ago

Congratulations, eulalia rubio.

Saturniidae27 3 years ago

Congrats Eulalia. Well deserved 🎉

MichaelS 3 years ago

Hi eulalia rubio,

Congratulations! Your spotting has been voted Spotting of the Week by the Rangers! Detailed biological notes on a fascinating and unique organism earn you our weekly feature.

eulalia rubio
eulalia rubio 3 years ago

Thanks, Mel11

eulalia rubio
eulalia rubio 3 years ago

Thank you very much, Antonio and all the rangers. It's always a joy to have a Project Noah award, because I feel like I'm putting a grain of sand to take care of nature
It is true that it is important, in addition to the photos, to provide as much written information as possible, as there are times when we do not do it because it is considered obvious, or because we add the link to a website, but there are species that are very common to us but completely exotic for the other part of the world.
Once again my dear thanks for this award.

“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!”

SukanyaDatta 3 years ago

Super...and so pretty too.

Mel11 3 years ago

Amazing spotting, there is always something unexpected out there. Thank you for sharing.

eulalia rubio
Spotted by
eulalia rubio

San Javier, Región de Murcia, Spain

Spotted on Apr 9, 2020
Submitted on Apr 9, 2020

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