Phylum Chordata
> Subphylum Vertebrata > fishes |
Flatheads
Family Platycephalidae
updated
Oct 2020
Where
seen? Like a cross between a crocodile and a fish, flatheads
are often encountered on our shores. In coral rubble areas as well
as sandy areas and seagrass meadows. Although large, flatheads are
usually overlooked as they blend in with their surroundings and are
sometimes half buried in the sand.
What are flatheads? Flatheads belong to the Family Platychephalidae.
According to FishBase:
the family has 18 genera and 60 species. They are found in the Indo-Pacific
oceans.
Features: 6-25cm
long. Some species can grow up to 1m long! The broad, flattened head
gives rise to the family's scientific name: 'Platys' means flat and
'kephale' means head in Greek. The snout is long and mouth huge; with
the lower jaw slightly longer than the upper jaw. The head has bony
ridges and some species have spines. Some species have elaborate tentacles
over the eyes. The long body is cylindrical and tapers towards the
tail. Spending most of the time on the sea bottom, most species lack
swim bladders.
Sometimes mistaken for other flattened fishes that live on the sea bottom. Here's more on how to tell apart fishes
with flat heads.
Disappearing Act: Flatheads often lie buried in sandy or muddy bottoms, sometimes with
only their eyes sticking out. Together with their camouflaged patterns,
they are hard to detect. |
East Coast, Nov 08 |
Changi, Jun 07 |
What do they eat? Flatheads eat
small fishes, octopus and cuttlefish, crustaceans and other animals
that live on the bottom. Their large, long mouths expand into a huge
funnel to suck up prey. They have vomerine teeth (bumps on the roof
of the mouth) to help grip and swallow prey.
Human uses: Some large species
of flatheads are considered good eating. They are caught by seining
and trawling. The Bartail flathead (Platycephalus indicus)
is commercially cultured in Japan for the table and is also used in
Chinese traditional medicine. |
Some Flatheads
on Singapore shores |
|
|
|
Bartail flathead |
No fringe or fleshy tentacles above the eyes. Instead, a large 'eyelid' that covers most of the eye, giving it a sleepy look. |
Tail colourful. |
|
|
|
Fringe-eyed flathead |
An elaborate golden filigree fringe over the eyeball, and above the eyes several fleshy tentacles. |
Tail not colourful. |
Unidentified
flatheads on Singapore shores |
Family
Platycephalidae recorded for Singapore
from
Wee Y.C. and Peter K. L. Ng. 1994. A First Look at Biodiversity
in Singapore.
*from Lim, Kelvin K. P. & Jeffrey K. Y. Low, 1998. A Guide to the
Common Marine Fishes of Singapore.
**from WORMS
+Other additions (Singapore Biodiversity Records, etc)
|
**Cociella crocodilus=Platycephalus crocodilus
**Cociella punctata=Platycephalus malabaricus
Cocius
crocodilus=**Cociella crocodilus
**Cymbacephalus bosschei=Platycephalus bosschei
**Cymbacephalus
nematophthalmus=Platycephalus nematophthalmus (Fringe-eyed flathead)
**Grammoplites scaber=Platycephalus scaber
**Inegocia japonica=Platycephalus bataviensis=Platycephalus isacanthus
**Sunagocia carbunculus=Platycephalus cantori
**Sunagocia carbunculus=Platycephalus carbunculus
Platycephalus indicus (Bartail
flathead)
**Rogadius serratus=Platycephalus polyon
**Rogadius asper=Platycephalus pristiger (Thorny flathead)
**Suggrundus macracanthus=Platycephalus sundaicus
**Sorsogona tuberculata=Platycephalus tuberculatus
+Thysanophrys celebicus (Celebes flathead) |
|
Links
Other
references
- Koh Kwan Siong & Kelvin K. P. Lim. 18 December 2015. New record of Celebes flathead in Singapore. Singapore Biodiversity Records 2015: 207
- W ee Y.C.
and Peter K. L. Ng. 1994. A First Look at Biodiversity in Singapore.
National Council on the Environment. 163pp.
- Ng, P. K.
L. & Y. C. Wee, 1994. The
Singapore Red Data Book: Threatened Plants and Animals of Singapore.
The Nature Society (Singapore), Singapore. 343 pp.
- Allen, Gerry,
2000. Marine
Fishes of South-East Asia: A Field Guide for Anglers and Divers.
Periplus Editions. 292 pp.
- Kuiter, Rudie
H. 2002. Guide
to Sea Fishes of Australia: A Comprehensive Reference for Divers
& Fishermen
New Holland Publishers. 434pp.
- Lieske,
Ewald and Robert Myers. 2001. Coral
Reef Fishes of the World
Periplus Editions. 400pp.
|
|
|