worms > Phylum Nemertea
Very long ribbon worm
Baseodiscus delineatus*
Family Valenciniidae
updated Aug 10

Where seen? This amazingly long ribbon worm is sometimes seen in coral rubble areas on some of our shores. Sometimes several are seen on the same visit!

Features: About 40cm to more than 1m long. White to cream body, with five or more blue or black stripes along the entire length of the body.

It is often seen oozing about, purposefully but not quickly. It never seems to be in a hurry and doesn't retract immediately into a hiding place even when a visitor splashes about near it.
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More than 1m long!
Pulau Sekudu, Jul 03

Very long ribbon worms on Singapore shores

Pulau Sudong, Dec 09


Pulau Jong, Aug 06


Cyrene Reef, Mar 07

more photos and video clips of very long ribbon worms on Singapore shores
northern shores
southern shores part 1 | part 2 | part 3

*Tentative identification. Species are difficult to positively identify without close examination.
On this website, they are grouped by external features for convenience of display.

Acknowledgement
With grateful thanks to Leslie H. Harris of the Natural History Museum of Los Angeles County for comments on the ID of this worm.

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References

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