Nudibranch questions

May 3, 1999
From: Christian Desprez

Dear Bill,

To permit me to complete my own informations about nudibranch, could you confirm for me some information about sea slugs.

- 1) Is it true that all the nudibranch are blind ?
- 2) Do you know if some species have the possibilitie to procreate together by used their own possibilities to modify their caracteristic (ADN) like some fish, and if this babies could survive.

Thank you in advance for your help.
Best regards

Christian Desprez

Christian.DESPREZ@wanadoo.fr

Desprez, C., 1999 (May 3) Nudibranch questions. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/837

Dear Christian,

Thanks for your questions. I hope these answers are useful. If you and your diving friends have any photos of the nudibranchs you are seeing I would be happy to post them on the Forum.

Are nudibranchs blind?
Nudibranchs have eyes, embedded deep in the skin. Have a look at the page in the Forum about the dorid head for some information about the eye and its function, and other sense organs.

Basically their eyes can't 'see' in the sense of forming images, and apprently can't do much more than detect shadows and light.

Can nudibranchs self-fertilise?
Nudibranchs, and other Sea Slugs, are hermaphrodite. That is they have a fully functional set of male and female organs. I know of no evidence that shows that they can fertilise their own eggs. As far as I know they have to mate with another partner.

Best wishes,
Bill Rudman.

Rudman, W.B., 1999 (May 3). Comment on Nudibranch questions by Christian Desprez. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/837

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