Brown-Lined Paperbubble
Hydatina physis

 

This has to be one of the most beautiful molluscs we get. It is circumtropical, but this is the first one I’ve seen in Lembeh. It is about 5cm long and it was a pleasure to watch this wonderful creature.

I found this on a night dive, moving around on the sand. The Paperbubbles are a type of marine snail and feed on small segmented worms. Their shell is very delicate, from where they get their ‘paper’ name from. As you can see they have a large foot/mantle, which cannot be completely retracted into the shell.

They burrow into the sand and completely disappear, which probably explains why we do not see them that often.

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