Glaucus in Hawaii

May 27, 2003
From: Chaunte Ling

Hi,
My brother found a sea slug at one of the beaches by my house. We live in Honolulu, Hawaii and this was the first time we saw something like it. I came home from boston and my brother and my dad had this weird looking thing in my fish tank. None of us knew what this little thing was. I stayed up late last night looking on the internet to figure what this thing was. At first I looked up jellyfishes, because when I was watching it is was kind of moving it's tenticles like a jellyfish. After awhile a blue sea slug website came up. This creature is very interesting and I was wondering if this sea slug is rare in Hawaii. I got to catch some man-of-wars to feed it and it was cool to watch it eat. If I were to catch some man-of-wars and put it in a jar would they be able to last or how long would they last? How do you tell if a sea slug is male or female? and How do you know if it is pregnant?
Thank you very much.
Chaunte

tay999@hotmail.com

Ling, C., 2003 (May 27) Glaucus in Hawaii. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10028

Dear Chaunte,
If you go to the Glaucus atlanticus Fact Sheet you will find quite a bit of information on this animal and its close relative G. marginata. Also scroll down on each page to see all the other messages about this topic.

Glaucus lives in the oceanic waters and is only found on shores when the wind blows it aground. Whenever you have Portugese man-of-wars [Physalia] washing ashore you are likely to find Glaucus. Concerning your other questions. All sea slugs are hermaphrodite - that is they have functional male and female reproductive systems. They also lay eggs so we can't really say they become pregnant. Have a look at the photos of the floating egg strings they produce.
Best wishes,
Bill Rudman

Rudman, W.B., 2003 (May 27). Comment on Glaucus in Hawaii by Chaunte Ling. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10028

Factsheet

Glaucus atlanticus

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