Keoki & Yuko Stenders' photo of the Blue Swallowtail Sea Slug (Chelidonura hirundina) which is black with blue and yellow lines, is common on shallow reefs. This Sea Slug feeds upon flatworms and is about 1 inch long.
Blue Swallowtail Sea Slug (Chelidonura hirundina)
By Stan & Debbie Hauter, About.com Guide
Blue Swallowtail Sea Slug (Chelidonura hirundina)
Keoki Stender©2009 About.com, a part of The New York Times Company.
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