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Phylum Mollusca > Class Gastropoda > sea slugs > Order Onchidiidae
Smooth little onch slug
awaiting identification*
Family Onchidiidae
updated Jun 2020
Where seen? This tiny to small onch slug is commonly seen on sheltered, shady areas with thick mats small seaweeds on many of our shores. For example, rocky shores shaded by coastal trees and sea walls under a jetty or bridge. Often seen in groups of small numbers.

Features: 1-3cm. Body hard, long, very rounded with a rather smooth skin with small regular bumps. Generally greyish or brown to black. Sometimes with lighter spots. Eyes on long thin stalks. The underside is white with a broad foot.

Pulau Sarimbun, May 05

Eyes on long thin stalks

Broad foot on the underside
Slippery slug: Avoid touching it as it is very slimy and if you try to pick it up, it generally slips out of your hands to bounce away among the rocks. The poor slug might get hurt and it may not be able to climb back up to where it can find food and safety.

Changi, Jun 05

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

Smooth little onch slugs on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores

Pulau Ubin, Mar 08
Photo shared by Marcus Ng on flickr.
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