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Phylum Echinodermata > Class Holothuroidea > Order Apodida > Family Synaptidae
Big synaptid sea cucumber
awaiting identification*
Family Synaptidae
updated Apr 2020
Where seen? This long fat synaptid sea cucumber with bobbles is sometimes seen on many of our shores among seagrasses and reefs. It is possibly seasonally common with many individuals encountered over a wide area during a single trip, then none for some time.

Features: 20-30cm to 50 cm long. Body cylindrical, thin skinned. Four rows of large almost spherical bumps ('bobbles') along the body. Bobbles usually mottled, often separated by four distinct plain lines. Feeding tentacles large flat and feathery. Each sea cucumber usually seen alone and not in groups. In various colours and patterns: dark maroon, pink, mottled brown, white. They may be different species.

Sometimes mistaken for worms. Here's more on how to tell apart worm-like animals.

Cyrene Reef, Oct 07

Large mottled bobbles separated by
distinct plain lines.

Terumbu Bemban, Mar 13

Four distinct lines separating 'bobble' area.

Cyrene Reef, Aug 12

Feathery feeding tentacles.

Body covered with tiny hooked sclerites.
Big synaptid sea cucumber (Family Synaptidae)

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

Big synaptid sea cucumbers on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores


Sentosa Serapong, Jul 11

Labrador, Feb 09
Shared by Loh Kok Sheng on his blog.

Labrador, Feb 09
Shared by Loh Kok Sheng on his blog.


Pulau Tekukor, Nov 20
Shared by Loh Kok Sheng on facebook.

Pulau Tekukor, Nov 20
Shared by Loh Kok Sheng on facebook.


Sisters Island, Dec 10
Photo shared by Rene Ong on facebook.


Terumbu Semakau, Apr 21
Photo shared by James Koh on flickr.

Beting Bemban Besar, Nov 14
Shared by Loh Kok Sheng on facebook.

Filmed on Cyrene Reef, Oct 08.

Synaptic Sea Cucumber @ Cyrene Reef from SgBeachBum on Vimeo.


Filmed on Cyrene Reef, Jul 08

giant synaptid sea cucumber ! ....from outaspace from SgBeachBum on Vimeo.


Big synaptid sea cucumber (Family Synaptidae)
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