White-margin sea slug

Glossodoris rufomarginata

''Glossodoris rufomarginata'', commonly called white-margin sea slug or caramel nudibranch, is a species of colorful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Brown Margin Glossodoris (Glossodoris rufomarginata) Seen in dive site Batu Lubang Besar. Geotagged,Glossodoris rufomarginata,Glossodoris rufromarginata,Indonesia,Spring

Appearance

''Glossodoris rufomarginata'' has a commonly observed length of 3.5 cm, with a maximum length of 5 cm.
The background coloration of the entire body is whitish with on the foot and the dorsal surface speckled with a dense coat of tiny red dots to orange-brown that gives the impression at first glance that the animal is brown.
The edge of the mantle is well developed and wavy with a broad white band with a red to orange-brown outer border. The foot has also a white external margin.
The rhinophores and branchial plume are retractable with a red to orange-brown coloration with a white median line on rhinophores and a white highlight on the gills axes.
Nudibranch - Glossodoris rufomarginata This Glossodoris rufomarginata Nudibranch is mostly orange/brown in colour with inner white margins.
They are around 3.5 cm in size and there are 2 of them in the picture.  During the dive, I didn't noticed there was another Nudibranch in the frame until I check my pictures on my laptop.  The 3rd Nudibranch is of another species, it is the tieny 'black/white' thing on the bottom of the picture towards centre left.  Despite the small size of this Glossodoris rufomarginata Nudibranch, can you imagine how small that tiny one was? Geotagged,Glossodoris rufomarginata,Nudibranch,Philippines,Summer,cebu,malapascua

Distribution

This species occurs in the tropical waters of Indo-Pacific area. It has been observed in localities as far distant from one another as Tanzania in Africa, Mayotte, but it occurs mainly from Sri Lanka to Polynesia and Hawaii.,
This nudibranch can be observed mostly on reef and rocky areas in sheltered as in exposed environment but with a preference for area in the shade.
White-margin sea slug (Glossodoris rufomarginata) Monument, Lembeh. Night dive. Also called caramel nudibranch. Geotagged,Glossodoris rufomarginata,Indonesia,Spring,White-margin sea slug

Behavior

Glossodoris rufomarginata has a daytime activity and can be easily met on or in close proximity to its favorite food source which are some black sponges of the family Thorectidae,
8_Nudi  Geotagged,Glossodoris rufomarginata,Glossodoris rufromarginata,Indonesia

Habitat

This species occurs in the tropical waters of Indo-Pacific area. It has been observed in localities as far distant from one another as Tanzania in Africa, Mayotte, but it occurs mainly from Sri Lanka to Polynesia and Hawaii.,
This nudibranch can be observed mostly on reef and rocky areas in sheltered as in exposed environment but with a preference for area in the shade.

References:

Some text fragments are auto parsed from Wikipedia.

Taxonomy
KingdomAnimalia
DivisionMollusca
ClassGastropoda
OrderNudibranchia
FamilyChromodorididae
GenusGlossodoris
SpeciesG. rufomarginata