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Blue Button

Porpita porpita


Porpita porpita, commonly known as the blue button, is a marine organism consisting of a colony of hydroids found in tropical and sub-tropical waters of the Pacific, Atlantic, and Indian oceans. Although it is superficially similar to a jellyfish, each apparent individual is actually a colony of hydrozoan polyps. The blue button is a Chondrophore, which is a group of cnidarians that also includes Velella and Porpema. The chondrophores are similar to the better-known siphonophores, which includes the Portuguese Man o' War. The blue button lives on the surface of the sea and consists of two main parts: the float and the hydroid colony. The hard golden-brown float is round, almost flat, and about one inch wide. The hydroid colony, which can range from bright blue turquoise to yellow, resembles tentacles like those of the jellyfish. Each strand has numerous branchlets, each of which ends in knobs of stinging cells called nematocysts. The blue button sting is not powerful but may cause irritation to human skin. The blue button itself is a passive drifter, and is part of the neustonic food web. It is preyed on by the sea slug Glaucus atlanticus (sea swallow or blue glaucus) and violet sea-snails of the genus Janthina. It competes with other drifters for food and mainly feeds on copepods and crustacean larvae. The blue button has a single mouth located beneath the float, which is used for both the intake of prey and the expulsion of wastes.


Pic#1 - top view Pic#2 - bottom view Pic#3 - close up of the tentacles

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AlbertKang 4 years ago

Thanks, @Laura for your kind words and liking this Spotting :)

LauraMaria 4 years ago

Wow!! Hydrozoans are cool, and this specimen is gorgeous! Really lovely cataloging of this organism, I especially love that last one.

AlbertKang 4 years ago

Thanks, @Ashley for another nomination :)

AshleyT 4 years 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!

AlbertKang 4 years ago

Thanks, @Antonio for your kind words.
I wish I could share such interesting Spottings every day ... ha ha, but good enough that there are PN Rangers/Members who find some of my Spottings interesting :)

Wow Albert ,like i said before,you surprise us almost every day :-) just astonishing ,congrats and thanks for sharing

AlbertKang 4 years ago

Thanks, @Gilma :)

Beautiful spotting, Albert....Love the colors.

AlbertKang 4 years ago

Thanks, @Mark, @Sukanya, @Leuba and @venusflytrap2000 :)

CalebSteindel 4 years ago

Incedible spotting! Thanks for sharing, Albert!

Leuba Ridgway
Leuba Ridgway 4 years ago

Wonderful ! thanks.

SukanyaDatta 4 years ago

Lovely...looks like a painting too.

Mark Ridgway
Mark Ridgway 4 years ago

That's incredible Albert. Thanks.

AlbertKang 4 years ago

Thanks, @Antonio and @Reza :)

Outstanding !

Wow albert,you surprise us everyday ;-) super series,beautiful,congrats and thanks form sharing

AlbertKang 4 years ago

Thanks, @Leanne and @Francisco
This is the first time I see it :)

Francisco Ramírez
Francisco Ramírez 4 years ago

Woooww spectacular shoot Albert !!!!

LeanneGardner 4 years ago

Incredible! Another amazing spotting Albert. Thank you.

Spotted by

Batangas, Philippines

Spotted on Jan 11, 2016
Submitted on Jan 12, 2016

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