"Berthella martensi comes in a range of colours, but this one is typical, but they can be almost colourless with brown spots. They can also lose parts of their mantle when threatened, so the result is some very odd looking sea slugs. "
Comment from Nathalie Yonow
Berthella martensi comes in a range of colours, but this one is typical, but they can be almost colourless with brown spots. They can also lose parts of their mantle when threatened, so the result is some very odd looking sea slugs.