Re: Scyllaea photos

November 27, 1998
From: Jim Needham

Dear Bill,

Yes, you have my permission to use the pixs and links for any enterprise that you deem would further the dissemination of such information advantagous for educational purposes.  That is in the spirit of the original concept of the net, back when it was
called the ARPAnet.

I would be very interested in learning about any experiences in keeping these critters alive.  I believe that their demise in my system was due to starvation.  As the Sargassum died off, I would guess that the hydroid population did likewise.  Info on the cultivation and propagation of such would be helpful.

Do you know if Dee's research, or anyone elses, has been fruitful on these guys ?

Thankyou for your time and interest.

Happy Holidays

Jim Needham

Needham, J., 1998 (Nov 27) Re: Scyllaea photos. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Thanks Jim,
I share your sentiments about the web. Concerning keeping your beasts alive, I think you have set yourself a difficult task. For one, hydroid colonies are difficult to keep alive in artifical conditions, partly because they need a continuous supply of healthy zooplankton to feed on, and partly because their delicate bodies have little protection from changes in salinity, presence of nasty chemicals etc.

Secondly algae, and in particular brown algae, are not good in aquaria because they produce many toxic chemicals both as metabolic byproducts and as a defensive strategy against herbivores. A forgotten piece of brown algae left in a tank or aquarium overnight can kill everything.

I would also be interested in any work that anyone is doing on these animals.

Thanks again,
Bill Rudman.

Rudman, W.B., 1998 (Nov 27). Comment on Re: Scyllaea photos by Jim Needham. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


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