ascidians text index | photo index
Phylum Chordata | Subphylum Tunicata/Urochordata | Class Ascidiacea
Yellow clustered bead ascidians
Eudistoma sp.*
Family Polycitoridae
updated Oct 2016

Where seen? These clusters of yellow blobs are commonly seen on many of our Northern shores, on hard surfaces near the mid-water mark.

Features: Each blob about 1cm across, somewhat columnar with a rounded top. Clusters of blobs form on boulders and larger rocks, usually near the base and under overhangs. Also on jetty pilings.

Blue-spotted flatworms have been seen near them, appearing to envelope a similarly shaped object. Do these worms eat the ascidian?
Labrador, Mar 05

Are they eaten by the Blue-spotted flatworm?
Changi, Jun 08

Tuas, Nov 03

Chek Jawa, Sep 02

Changi, Jun 08

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

Yellow clustered bead ascidians on Singapore shores

Photos of Yellow clustered bead ascidians for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map

Berlayar Creek, Dec 10
Photo shared by Loh Kok Sheng on flickr.

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