seen? These squids are sometimes seen in numbers on our
Southern shores. Among seagrasses, also near coral rubble and reefs.
They are often seen with their arms held splayed out when alarmed.
They typically gather near the bottom during the day, dispersing in
the water at night to hunt. Many are attracted to light and they are
often fished at night using a light.
Features: Those seen 8-12cm long,
but other species of this family that live in deeper waters can grow
to 40cm. Those we have seen in the intertidal zone are rather short
and squat. Some are long and slender with triangular fins at the rear
end. Others are more squat with wide fins that extend along the entire
body length. Arms about half the length of the body, rather broad.
Sometimes, enormous ones 30cm or larger are seen. Studies suggest
some species only live for a few months.
The family has 5 genera and more than 40 species that can only be
identified by examining fin size and shape, sucker ring shapes and
modifications on the lower left arm of mature males. Most
members of this family are smooth, streamlined, torpedo-shaped squids
that can swim fast.
Human uses: Our popular seafood
squids belong to this family.
Ink squirted out retains its shape.
Sister Island, May 12
Which is ink and which is squid?
Tanah Merah, Jun 11
This one was about 30cm long!
*Species are difficult
to positively identify without close examination.
On this website, they are grouped by external features for convenience of
Loliginidae recorded for Singapore
Tan Siong Kiat and Henrietta P. M. Woo, 2010 Preliminary Checklist
of The Molluscs of Singapore.
- Family Loliginidae
in the Cephalopod section by J.M. Poutiers in the FAO Species
Identification Guide for Fishery Purposes: The Living Marine Resources
of the Western Central Pacific Volume
1: Seaweeds, corals, bivalves and gastropods on the Food and
Agriculture Organization of the United Nations (FAO) website.
- Tan Siong
Kiat and Henrietta P. M. Woo, 2010 Preliminary
Checklist of The Molluscs of Singapore (pdf), Raffles
Museum of Biodiversity Research, National University of Singapore.
- Norman, Mark
and Helmut Debelius, 2000. Cephalopods:
A World Guide.
ConchBooks, Germany. 319 pp
Mark and Amanda Reid. 2000. A
Guide to Squid, Cuttlefish and Octopuses of Australasia
The Gould League of Australia. 96pp.