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Phylum Mollusca > Class Gastropoda > Family Muricidae
Elegant drill
Thais sp.*
Family Muricidae
updated Aug 2020

Where seen? This drill is often seen in groups on large boulders on our Nothern shores. Sometimes, groups of small ones are seen under large stones.

Features: 2-3cm. Shell thick but not as thick as those of Chunky drills. With variable patterns, some with spiralling grooves, others with
a spiral pattern of bumps or spiral of small blunt spines. Shell opening wide. Operculum orange or yellow.

Various species of Thais commonly seen on our shores have this kind of shells. They are difficult to distinguish with certainty in the field. On this website, they are grouped by external features for convenience of display.

Chek Jawa, Jan 05

Underside

Chek Jawa, May 05

Changi, May 05

Changi, Jul 05

Underside.
Drill Babies: Some drills lay clusters of bright yellow egg capsules on hard surfaces. The egg capsules turn purple when the free-swimming larvae hatch.

Changi, Jul 05

Yellow capsules yet to hatch,
Hatched capsules purple.

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

Elegant drills on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores


Sembawang, Dec 09
Photo shared by Loh Kok Sheng on flickr.

Punggol, Apr 19
Photo shared by Shawne Goh on facebook.

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