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Cassiopeia jellyfish...

mare, mare, ancora mare!!!

View gallery (21 photos)

Cassiopeia jellyfish sent on October 01, 2019 (16:19) by Sergio Bartolomeo. 132 comments, 835 views. [retina]

1/250 f/4.2, ISO 125, hand held. Messina, Italy.

Cambiamenti climatici, pesca intensiva, impoverimento delle specie ittiche che si nutrono di plancton: sono tanti i fattori che hanno spinto la bellissima, quanto innocua, medusa Cassiopea Mediterranea (Cotylorhiza tuberculata) a comparire nei nostri mari. Sono stati numerosi gli avvistamenti, specie nell'ultimo periodo, di questo splendido esemplare nelle nostre acque, prevalentemente tra il messinese e le isole Eolie. Questa specie, che raggiunge i 30 cm di diametro, presenta un caratteristico ombrello a forma di disco bianco, con una gobba rotonda e gialla al centro (sembra un uovo all'occhio di bue). Il margine è tipicamente frastagliato, di colore giallo o talvolta verdastro per la presenza di zooxantelle: alghe unicellulari che assorbono il diossido di carbonio liberato dall'ospite e che, in cambio, gli forniscono particolari sostanze nutrienti. Questa medusa vive a pochi centimetri di profondità, circondata da piccoli pesci che usano i suoi tentacoli per trovare il nutrimento necessario. Tipica la presenza di piccoli avannotti. Nonostante le dimensioni, impressionanti rispetto alle classiche meduse, la Cassiopea non è urticante e, vista la sua importanza ecologica (fungono da filtro per l'acqua di mare), gli esperti consigliano vivamente di non catturarle! -------Tutte le foto contenute in queste gallerie sono copyright Sergio Bartolomeo e non possono essere utilizzate in alcuna forma senza il consenso dell'autore.



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avatarsupporter
sent on October 01, 2019 (17:24) | This comment has been automatically translated (show/hide original)

Congratulations Sergio,
for the beautiful image and for the... Caption.
A dear greeting,
Paul

avatarsupporter
sent on October 01, 2019 (17:31) | This comment has been automatically translated (show/hide original)

growing up I want to become as good as you :-P
chapeau Sergio, wonderful

avatarsenior
sent on October 01, 2019 (17:55) | This comment has been automatically translated (show/hide original)

Wow what a show Sergio! :-o
What a wonderful being! And what colors! The presence of the camouflaged fish is also nice. Congratulations indeed, even for the caption. ;-)
Hello
Roberto

avatarsupporter
sent on October 01, 2019 (19:26) | This comment has been automatically translated (show/hide original)

A shot that looks good...... Very interesting caption.......
Hello Raymond

avatarsenior
sent on October 01, 2019 (20:55) | This comment has been automatically translated (show/hide original)

Fabulous and interesting shot Sergio, beautiful colors with the cherry of the little fish, very interesting the caption. Congratulations on the catch.
Hello Andrea

avatarsupporter
sent on October 01, 2019 (21:09) | This comment has been automatically translated (show/hide original)

Beautiful ;-) Hello Corrado

avatarsenior
sent on October 01, 2019 (21:41) | This comment has been automatically translated (show/hide original)

Very beautiful as composition. jellyfish and minnow..... Perfect symbiosis :-P wonderful colors and detail :-P will definitely be harmless but I would never trust... maybe because I've had bad experiences :-/ Congratulations dear Sergio ;-) Hello Rosario

avatarsenior
sent on October 01, 2019 (22:43) | This comment has been automatically translated (show/hide original)

What beautiful colors!!!! :-o Great shot.
COMPLIMENTs
Nadia

avatarsenior
sent on October 01, 2019 (23:54) | This comment has been automatically translated (show/hide original)

Image copyright Getty Images/E

iol

avatarsenior
sent on October 02, 2019 (6:40) | This comment has been automatically translated (show/hide original)

Very beautiful for composition and colors.
Hello. Eus

avatarsenior
sent on October 02, 2019 (7:45) | This comment has been automatically translated (show/hide original)

Congratulations Sergio a beautiful shot, accompanied by a full caption.
A dear greeting William

avatarsupporter
sent on October 02, 2019 (8:12) | This comment has been automatically translated (show/hide original)

Beautiful image with excellent colors, very interesting the story.
Congratulationsergio, hello!
Sergio ;-) :-P

avatarsupporter
sent on October 02, 2019 (9:15) | This comment has been automatically translated (show/hide original)

Great story and beautiful picture
Hello
Giuliano :-P

avatarsenior
sent on October 02, 2019 (13:10) | This comment has been automatically translated (show/hide original)

subject of sure impact
good shooting
hello :-)

avatarsupporter
sent on October 02, 2019 (17:11) | This comment has been automatically translated (show/hide original)

Beautiful image and excellent capture, not infrequently I have also seen from my parts of Cassiopee, interesting the caption to which you should give the maximum diffusion because not everyone knows that these beautiful jellyfish to see are absolutely harmless.
Good Sergio!

avatarsenior
sent on October 02, 2019 (17:26)

Excellent close up, good details and good color rendition!
Simply amazing!
Hello: Delphinus

avatarsupporter
sent on October 02, 2019 (17:38) | This comment has been translated

What beautiful colors!

avatarsenior
sent on October 02, 2019 (17:49) | This comment has been automatically translated (show/hide original)

Beautiful jellyfish with beautiful shape and colors! Congratulations!hello.

avatarsupporter
sent on October 02, 2019 (19:12) | This comment has been automatically translated (show/hide original)

Image copyright Getty Imagesimage and caption
Congratulations Sergio
A greeting
Mauro ;-) :-P

avatarsupporter
sent on October 02, 2019 (19:19) | This comment has been automatically translated (show/hide original)

A jellyfish with such beautiful colors I didn't even think it could exist. Very nice, Sergio, and very interesting wing caption. Congratulations.
Hello, John





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