Guardian Nature School Team Contact Blog Project Noah Facebook Project Noah Twitter

A global community of nature enthusiasts
photographing and learning about wildlife

Join Project Noah!
nature school apple icon

Project Noah Nature School visit nature school

Much-desired Flabellina

Flabellina exoptata


Also known as Flabellina Sea Slug, Expat Flabellina and Sonic the Hedgehog Nudibranch, this nudibranch's body is slender and translucent pink with a purple tinge. The base of its cerata is the same color as the body, but is banded by dark purple and tipped with white. Its rhinophores are typically a bright orange. They feed on hydroids, coral, sponges and sea anemones, and grow to a length of about 3cm.


Found singly or in pairs on coral and rocky reefs in sand and rubble areas, at depths of 2 to 40m. Widespread in the Indo-Pacific region.


I'm very happy to have finally seen F. exoptata in my home area, and two of them right away! Spotted these beauties off the coast of Paradise Island Beach Resort on Samal Island, Philippines, at a depth of 15.5m. They were perched on a seaweed or hydroid, and the one on top seemed to be feeding. The one below jerked several times, and two of its cerata looked bloated. Each of them measured about 1.5cm long.

Species ID Suggestions

Sign in to suggest organism ID


Blogie 8 years ago

Thanks, nexttogone! I'm a diver and that's *exactly* how I feel whenever I see these stupendous creatures underwater! :D

nexttogone 8 years ago

Beautiful shots.... I would never come up for air if I was a diver.

Spotted by

Davao del Norte, Philippines

Spotted on Oct 7, 2012
Submitted on Oct 9, 2012

Noah Guardians
Noah Sponsors

Join the Project Noah Team Join Project Noah Team