Comment from the photographer: First time I saw those red arthropods. Anyone know what they are called?

Photo Information

Photographer
Bernd Hoppe
Species name
Phyllidia varicosa
Verified by
Taken on
22 January 2012 11:08:58 am
Posted
13 years ago
Updated
3 months ago

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EXIF Information

Camera
Olympus E-PL2
Date and Time
2011:12:22 11:08:58
Exposure Time
1/100
Exposure Bias
-7/10
Focal Length
45/1 mm
Horizontal Resolution
3140000/10000 dpi
Vertical Resolution
3140000/10000 dpi
Aperture
f/8.0
ISO
1000
Exposure Program
Creative program (biased toward depth of field)
Exposure Mode
Manual exposure
Metering Mode
Center Weighted Average
Light Source
other light source
Flash
Flash did not fire, auto mode
White Balance
Manual white balance
Color Space
sRGB
Software
Adobe Photoshop Elements 7.0 Windows

Scientific Classification

KingdomAnimalia
PhylumMollusca
ClassGastropoda
OrderNudibranchia
SuborderDoridina
FamilyPhyllidiidae
SpeciesPhyllidia varicosa