Red-lined Flabellina (Flabellina rubrolineata)
© John Turnbull
I love these flabellinas - I had not seen them until Port Stephens. They are quite small - this one is less than an inch long. You can see the grains of sand throught he translucent lower foot.
Photo taken on 20 Apr 2013
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Attribution-NonCommercial-ShareAlike License