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worms > Phylum Platyhelminthes > Class Turbellaria > Order Polycladida
Yellow-lined flatworm
Pseudoceros sp. 3*
Family Pseudocerotidae
updated Feb 2020

Where seen? This small flatworm is sometimes seen on some of our shores, on coral rubble near living reefs.

Features: 2-4cm long. Body light bluish-white to bluish (not solid blue and not white). One central line that is yellow with dark blue border. Has a pair of pseudotentacles made up of simple folded edges of the body.

Sometimes mistaken for similar flatworms. Here's more on how to tell apart small flatworms with one central line and three central lines.

With a blue-and-yellow line.
Chek Jawa, Oct 03
 

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

Yellow-lined flatworms on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores


Sentosa Tg Rimau, Apr 21
Photo shared by Richard Kuah on facebook.


St. John's Island, Sep 07
Photo shared by Toh Chay Hoon on her flickr.

St. John's Island, Sep 07
Photo shared by Loh Kok Sheng on his blog.


Pulau Tekukor, Sep 18
Photo shared by Dayna Cheah on facebook.

Lazarus, Jul 11
Shared by Loh Kok Sheng on his blog.

Pulau Semakau, Aug 11
Photo shared by Lok Kok Sheng on his blog.

Acknowledgement
Grateful thanks to Rene Ong for sharing details and identifying the flatworms on this page.

References
  • Rene S.L. Ong and Samantha J.W. Tong. 29 October 2018. A preliminary checklist and photographic catalogue of polyclad flatworms recorded from Singapore. Nature in Singapore 2018 11: 77–125.
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