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Blue Nudibranch

Glaucus marginatus

Description:

Tiny blue nudibranch with a 'wingspan' of under 1cm. The blue colours are actually on the ventral surface, as these creatures float upside down in the ocean using the 'foot' along the centre of their belly to hold the surface tension.

Habitat:

The Pacific Ocean. We found this one washed up on Yaroomba beach.

Notes:

Not a great deal seems to be known about these tiny sea slugs, except that they eat bits of hydrozoans such as Portuguese Men o' War (blue bottles) and Porpita porpita (blue buttons) and store the stingers in their 'cereta' (the finger-like protusions along the side of their body). I think they're really cute. This series shows one in a variety of poses... in the second one you can see how small it is (check out the grains of sand around it on the surface of the water!) and the fourth one shows it flipped onto its front as the water goes out.

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30 Comments (1–25)

Jim Nelson
Jim Nelson 3 years ago

I suspected this one was a winner! Well Done, Shanna!

The MnMs
The MnMs 3 years ago

Indeed a beauty..congrats!

Mark Ridgway
Mark Ridgway 3 years ago

Such good shots.. cobgrats.

ShannaB
ShannaB 3 years ago

Thanks Lisa & Christiane!

Christiane
Christiane 3 years ago

Congratulation Shanna.. I so hoe I can find one of these one day!

LisaPowers
LisaPowers 3 years ago

Congrats ShannaB, your beautiful alien-like Blue Nudibranch placed 2nd in the "other" category for the Best of 2015! Here is the link for the '2016 Best Wildlife Photo mission so you can add more fantastic spottings for this year! http://www.projectnoah.org/missions/2004...

https://www.facebook.com/projectnoah/pho...

ShannaB
ShannaB 3 years ago

Thanks Ashley! Jim, Albert is right - we found these washed up on the beach. We scooped out a hollow in the sand so we could see these guys floating, and I took the photo from above. They are absolutely tiny - in the second shot you can see the grains of sand floating on the surface of the water.

Jim Nelson
Jim Nelson 3 years ago

All this time, I have been looking in the wrong places.

AlbertKang
AlbertKang 3 years ago

@JimNelson, its more likely you will see this Nudibranch at the beach than when scuba diving.

Jim Nelson
Jim Nelson 3 years ago

Shanna...I have spent many years diving, and have never seen this one. Underwater macro sometimes takes time and patience. Great job on this one!

Christiane
Christiane 3 years ago

Love this little cutie.. :)

AshleyT
AshleyT 3 years ago

Congrats Shanna, your unique Nudibranch has made the top 10 other spottings in the '2015 Best Wildlife Photo' mission! Rangers are voting on the top 10 other spottings, and the top 3 will be announced on February 7th. The top 3 spottings will be commented on here on the site, but make sure you keep a look out on our Facebook app page for the announcement as well! Congratulations on making the top 10! https://www.facebook.com/projectnoah

Desmond.E.S.O
Desmond.E.S.O 4 years ago

BEAUTIFUL!!!

sunnyjosef
sunnyjosef 4 years ago

Congrats Shanna... great spotting...

Christiane
Christiane 4 years ago

WOW.. Congrats Shanna. Great spotting..

DanielePralong
DanielePralong 4 years ago

Congrats Shanna!

Leuba Ridgway
Leuba Ridgway 4 years ago

One of my favourite creatures. Great shots Shanna and a well deserved SOTD. Congratulations !

Neil Ross
Neil Ross 4 years ago

Congratulations, Shanna. This is a wonderful spotting. Awesome photos and info too.

VivBraznell
VivBraznell 4 years ago

Stunning SOTD Shanna .. congratulations! Great set of images. The wings in image 4 look like a pair of feet :)

Mark Ridgway
Mark Ridgway 4 years ago

Congrats. I'd love to find one of these little beauties.

CalebSteindel
CalebSteindel 4 years ago

Yet another great sea slug shanna! Congrats

James McNair
James McNair 4 years ago

Exquisite and well deserved SOTD Shanna

ShannaB
ShannaB 4 years ago

Thank you, Yasser!

Yasser
Yasser 4 years ago

Shanna, this spectacular sea slug is our Spotting of the Day! Thanks for sharing this incredible series with us and we look forward to a wonderful and wild 2015 filled with lots of awesome spottings, just like this one. Happy New Year and Congrats again!

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Awesome series Shanna ,beautiful collours and a very unsual "design" :-)
Congrats and thanks for sharing

ShannaB
Spotted by
ShannaB

QLD, Australia

Lat: -26.55, Long: 153.10

Spotted on Jan 8, 2015
Submitted on Jan 10, 2015

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