I need Pteraeolidia ianthina

October 4, 2005
From: Albert B Jeffers

I have a problem with Myrionema hydroids in my reef tank. I have succcesfully controlled other organisms with the use of certain slugs, through the kind advice of you guys on this forum. I need to purchase Pteraeolidia ianthina from somewhere, I don't care where and have no problem with money when it comes to saving my extensive collection of corals.
I fully understand the hazards of keeping zooxanthellate bearing slugs in a coral tank and I am willing to pick them out after the job is done and pass them on to fellow aquarists with the same problem.
If my only option is to get them from a research facility or school, I will be glad to furnish pictures and written observation of my attempt.
Albert Jeffers (squeezix on reefcentral)
Vero Beach, Florida, USA

acidbaby@bellsouth.net

Jeffers, A.B., 2005 (Oct 4) I need Pteraeolidia ianthina. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/14917

Dear Jeff,
I'm afraid you seem to have missed the point that most nudirbranchs have very specialised diets. Those with zooxanthellae symbiosis certainly don't eat all cnidarians with zooxanthellae, they eat only one or a few closely related species. Most zooxanthellae zymbionts get their zooxanthellae not from hard corals, but from either soft corals or sea anemones. Pteraeolidia, as you'll see from the Fact Sheet, is an exception./ It eats hydroids as an adult, but only some solitary hydroids related to Tubularia which don't have zooxanthellae. They apparently get their zooxanthellae from some unknown small hydroid as juveniles. The point I am trying to make is that there is no evidence that they eat Myrionema.

This is the reason that keeping nudibranchs in aquaria is a bad idea. Most have very specialised diets. Just because you hear that dorid nudibranchs eat sponges, it doesn't mean you can throw in any sponge and think any dorid will eat it. Similarly Pteraeolidia is so fussy we don't even know what it eats as a juvenile and as an adult it certainly doesn't eat Myrionema.
Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Oct 4). Comment on I need Pteraeolidia ianthina by Albert B Jeffers. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/14917

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