SCUBAZOO / SCIENCE PHOTO LIBRARY SCUBAZOO / SCIENCE PHOTO LIBRARY
Two purple-lined nembrotha, Nembrotha purpureolineata. These nudibranchs have gathered together to feed on a bright blue tunicate. The colouration of the nudibranchs is a warning to anything that might try and eat them. Photographed in Lembeh, Sulawesi, Indonesia.
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