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Large-tooth
flounders
Family Paralichthyidae
updated
Sep 2020
if you
learn only 3 things about them ...
Eyes on the left side of the body only.
Tail and dorsal and anal fins separated.
Found
beneath the sand. Watch your step! |
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Where
seen? These large flatfishes are seen on some of our shores,
on sandy areas near seagrasses or near coral reefs.
What are large-tooth flounders? Large-tooth flounders are flatfishes belonging to the Family Paralichthyidae (they were previously placed
in Family Bothidae). According to FishBase:
the family has 16 genera and 86 species. They are found in the Atlantic,
Indian and Pacific oceans.
Features: Grows to about 40cm long, those seen about
15-20cm. Body flat but typical fish-shaped. The head is large with
bulbous eyes, both on the left side. The tail fin is well separated
from the dorsal and anal fins. The tail fin is somewhat pointed over
the middle portion. Has a fully developed lateral line on the blind
side as well as the eyed side. The lateral line on the eyed side makes
a distinctive curve over the pectoral fin (not really obvious in a
living fish). The mouth is large, filled with teeth and many have
enlarged canine teeth. The eyed side is usually speckled with spots
of various sizes and matches the colour of its sandy surroundings.
Sometimes confused with other flatfishes.
The Oriental sole looks very similar but it is right-eyed. The Three-spot flounder looks similar, is left-eyed too, but is more circular and has three large spots. Here's more
on how to tell
apart the flatfish families commonly seen. |
Some species have a white patch
under the pectoral fin.
Changi, Jul 06.
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Tail fin well separated from dorsal and anal fins.
Pulau Semakau, Sep 05 |
Eyes on the left side.
Large mouth with canine teeth. Pelvic fin. |
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What do they eat? Large-tooth
flounders hunt animals and fishes living on the bottom of the sea.
They can swim quickly and are active during the day.
Human uses: Some larger species
are considered excellent to eat and are economically important. |
*Species are difficult
to positively identify without close examination.
On this website, they are grouped by large external features for convenience
of display.
Large-tooth
flounders on Singapore shores |
Other sightings on Singapore shores |
Changi Creek, May 21
Photo shared by Marcus Ng on facebook. |
Changi, May 11
Photo
shared by James Koh on his
blog.
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Pulau Sekudu, Jun 14
Photo shared by Marcus Ng on flickr. |
Changi, May 11
Photo shared by Marcus Ng on flickr. |
East Coast Sailing Centre, May 2024
Photo shared by Kelvin Lim on facebook. |
Pulau Sekudu, Jul 15
Photo shared by Loh Kok Sheng on flickr. |
Beting Bronok, Jul 19
Photo
shared by Abel Yeo on facebook. |
Beting Bronok, Jun 16
Photo
shared by Jonathan Tan on facebook. |
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Seringat-Kias, Feb 11
Photo shared by Loh Kok Sheng on his
flickr.
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Kusu Island, Jun 24
Photo
shared by Marcus Ng on facebook. |
Kusu Island, Jun 24
Photo
shared by Marcus Ng on facebook. |
Little Sisters Island, Jul 17
Photo shared by Lisa Lim on facebook. |
Cyrene Reef, May 08
Photo
shared by James Koh on his
flickr
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Cyrene Reef, Jan 19
Photo
shared by Jianlin Liu on facebook. |
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Cyrene Reef, Jul 10
Photo shared by James Koh on his
blog |
Cyrene Reef, Apr 23
Photo shared by Loh Kok Sheng on facebook. |
Pulau Semakau North, Jul 24
Photo shared by Tommy Tan on facebook. |
Family
Paralichthyidae recorded for Singapore
from
Wee Y.C. and Peter K. L. Ng. 1994. A First Look at Biodiversity
in Singapore.
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Family
Paralichthyidae (previously in Family Bothidae) |
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Pseudorhombus
arsius (Large-tooth flounder)
Pseudorhombus
javanicus (Javan flounder)
Pseudorhombus malayanus
Pseudorhombus neglectus (Deep flounder)
Pseudorhombus oligodon
Pseudorhombus polyspilos |
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Links
References
- Tan Heok Hui & Kelvin K. P. Lim. 30 Jun 2017. Deep flounder, Pseudorhombus neglectus, at East Coast. Singapore Biodiversity Records: 2017: 73.
- Lee Bee Yan, Tan Heok Hui & Kelvin K. P. Lim. 31 May 2017. Javan flounder, Pseudorhombus javanicus, at Tuas. Singapore Biodiversity Records: 2017: 73.
- 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.
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