Sagaminopteron ornatum - showing feeding?

November 24, 2003
From: Jason Bell

To accompany my photos of an adult Sagaminopteron ornatum on Nov 16, 2003 on Hatsushima Island, Izu, Japan, here are some photos of a juvenile, which was less than a third the size of the adult. On my second dive, the adult had gone undercover in some vegetation. I believe it shows the juvenile feeding on some worms (?). I did not see the possible food source until I uploaded the pics.

I hope this helps.
Jason Bell

Bell, J., 2003 (Nov 24) Sagaminopteron ornatum - showing feeding?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Jason,
Thanks for these tantalising photos. The small animal does seem to be crawling on an area with many small polychaete tube worms, many with their fan-like feeding tentacles displayed. However from your sequence of shots, it seems the slug has taken a sudden interst in the orange and white object on its right side. Ot perhaps it just decided to turn around at that moment. I'm afraid I can't identify what the orange and white object is either.

As I said, it is a tantalising observation, but .... Hopefully we will someday find out what Sagaminopteron, or for that matter, any gastropterid, feeds on
Best wishes
Bill Rudman

Rudman, W.B., 2003 (Nov 24). Comment on Sagaminopteron ornatum - showing feeding? by Jason Bell. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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