Another misleading aquarium sale

November 25, 2009
From: Kevin Bott

Sorry but I will now add myself to the list of stupid people who buy nudi's as one thing but then find out its another

It was sold as an algae-eating green/yellow nudi

After a 5 days of not seeing any feeding I contacted the LFS who now try and say that they only sell lettuce slugs and blue dorids

But from what i have now seen this is not a lettuce slug

could you please help with ID and food types if known

Thank you

Bott, K., 2009 (Nov 25) Another misleading aquarium sale. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Kev,

I am afraid this is no lettuce slug. It is a sponge-feeding nudibranch Ceratosoma sinuatum. Have a look at Mandi Woods' message [#22789]. She had a very similar experience - I just hope you didn't end up with the slug she returned!

As I told her, the news is not good. We are not sure what this animal eats, other than it is a sponge, probably of the Dysideidae family. I am afraid an LFS could not be trusted to deliver you with the right sponge - even if they could keep it alive. Keeping sponges alive in aquaria is very difficult. And what you want is to be able to keep a sponge alive so that a nudibranch can eat it alive. Every bit of damage the sponge would sustain would make it just that little bit more difficult for you to keep it alive in your aquarium. My advice would be to demand your money back and tell all your friends to take their business to a more ethical and/or knowledgeable business

Best wishes,
Bill Rudman

Rudman, W.B., 2009 (Nov 25). Comment on Another misleading aquarium sale by Kevin Bott. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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