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Geographic Sea Hare

Syphonota geographica


The clade Aplysiomorpha, commonly known as Sea hares, are medium-sized to very large Opisthobranchia with a soft internal shell made of protein. These are marine gastropod molluscs in the superfamilies Aplysioidea and Akeroidea


This specimen was spotted during night dive in a sandy/sea grass area. Sea Hares are usually found in the shallows and at time, during low tides, they can be exposed. They are mostly found during night time (except during low tides). During day time, they can bury themselves into sands to hide.


Some species of Sea Hares, when threatened/provoked, may release a purple-colored dye that can be mildy poisoinous to fishes.

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36 Comments (1–25)

alicelongmartin 10 years ago


Congrats again Albert on the well deserved SOTD

AlbertKang 10 years ago

That's the plan, @Gilma, to do a liveaboard diving to Cocos and then followed by land trips in Costa Rica :)
Will get in touch with you for some tips/suggestions :D

Would love to do that and will look forward to it, but you can do the snorkeling/diving...Sea life is fantastic here in Costa Rica, hammer heads, turtles, sharks, whales, sea horses, water snakes all kind of tropical fish.... I like the land spotting better because it is easier.. : (

AlbertKang 10 years ago

Finally, was able to find the exact ID/specie of this Sea Hare :)

AlbertKang 10 years ago

Thanks, @Leanne, @Gilma and @Yasser :)

Glad you enjoyed my spottings, @Gilma.
Am planning to go to Costa Rica next year, maybe can go spotting with you when there ;)

Yasser 10 years ago

Awesome shot! Congrats on a well deserved SoTD!

Congratulations on the SOTD, AlbertKang, well deserved!!
Your beautiful spottings, are..."Spotting Of My Day" every time I see one!!

LeanneGardner 10 years ago

Congratulations Albert! Beautiful spotting :)

AlbertKang 10 years ago

Thanks, @Daniele, @Wild Things and @surekha :)

surekha 10 years ago

Gorgeous! Congratulations, AlbertKang!

Wild Things
Wild Things 10 years ago

Beautiful spotting! Congrats Albert!

DanielePralong 10 years ago

Beautiful! Congrats AlbertKang!

AlbertKang 10 years ago

Thanks, @Mark, @Mac and @Lauren.

I only saw this green Sea Hare once in all my 10 years of scuba diving in Anilao, Philippines, and that's more than 1000 dives. So, I can say this is a rare sighting :D

LaurenZarate 10 years ago

Congratulations Albert! This one is remarkable and so psychedelic looking. Just amazing.

MacChristiansen 10 years ago

Congratulations Albert on your SOTD

Mark Ridgway
Mark Ridgway 10 years ago

Congrats. Wonderful animal.

AlbertKang 10 years ago

Thank you, @Sachindra, @Arturo and @Jolly :)

Jolly Ibañez
Jolly Ibañez 10 years ago

Congratulations Albert. Simply beautiful

ArturoOrtiz 10 years ago

Congrats on yout SOTD, great spotting and photo!!

SachindraUmesh 10 years ago

wow!! absolutely awesome!!!the colors look stellar!!!!

AlbertKang 10 years ago

Wow, am honored!

Thanks, @Karen and Ashley :)

AshleyT 10 years ago

Congrats Albert, you take such great underwater photos!

KarenL 10 years ago

Congratulations Albert, your psychedelically patterned sea hare is Spotting of the Day!

Sea hares were named by the Ancient Greeks for their supposed resemblance to the European hare, and are members of the Opisthobranchia family of marine gastropod molluscs. Their “rabbit ears” are sensing organs called rhinophores, which are used for detecting chemicals dissolved in sea water.


AlbertKang 10 years ago

Thanks, @Arya.
I am using Sony RX100 in Patima housing.

Spotted by

Batangas, Philippines

Spotted on Jan 27, 2013
Submitted on Mar 4, 2014

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