dcsimg

Diagnostic Description

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A series of 8-10 roundish dark marks along the base of the soft dorsal fin, some or all of which are continuous with vertical bars on the posterior part of the body (Ref. 27732). Predorsal vertebrae usually only 4-5 (6 in a single specimen); rostral tooth plates absent; rim of anterior tubular nostril with 4 nearly equal digitiform processes (or 2 fimbriae and 2 fimbrules); dorsal, anal and caudal fins confluent; caudal fin pointed posteriorly (not truncate or round, typically with 5/5 or 6/6 rays; total caudal fin rays 10-13) (Ref. 39392).
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Recorder
Crispina B. Binohlan
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Morphology

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Dorsal spines (total): 28 - 32; Dorsal soft rays (total): 46 - 58; Analsoft rays: 53 - 65; Vertebrae: 71 - 75
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Biology

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A burrower (Ref. 39392).
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Macrognathus semiocellatus

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Macrognathus semiocellatus is a species of ray-finned fish endemic to Cambodia, Laos and Vietnam; it found in marshlands and vegetated water bodies in Mekong Chao Phraya River and Mae Klong.[2] It spends its time during the day buried in silt, sand or fine gravel and forages at night for benthic insect larvae, crustaceans and worms.[3]

It is listed as Least Concern as it is locally and seasonally common and its threats are not significant and there is no need for conservation protection; the threats are pollution and wetland removal. It is seen aquariums and is also fished and exported from Cambodia to Thailand and other countries.[1]

References

  1. ^ a b Vidthayanon, C. (2012). "Macrognathus semiocellatus". IUCN Red List of Threatened Species. 2012: e.T180795A1663439. doi:10.2305/IUCN.UK.2012-1.RLTS.T180795A1663439.en. Retrieved 20 November 2021.
  2. ^ a b Froese, Rainer; Pauly, Daniel (eds.) (2019). "Macrognathus semiocellatus" in FishBase. August 2019 version.
  3. ^ Rainboth, Walter J. (1996). Fishes of the Cambodian Mekong. Food and Agriculture Organization. p. 179. ISBN 9251037434. Retrieved June 5, 2015. Macrognathus semiocellatus.
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Macrognathus semiocellatus: Brief Summary

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Macrognathus semiocellatus is a species of ray-finned fish endemic to Cambodia, Laos and Vietnam; it found in marshlands and vegetated water bodies in Mekong Chao Phraya River and Mae Klong. It spends its time during the day buried in silt, sand or fine gravel and forages at night for benthic insect larvae, crustaceans and worms.

It is listed as Least Concern as it is locally and seasonally common and its threats are not significant and there is no need for conservation protection; the threats are pollution and wetland removal. It is seen aquariums and is also fished and exported from Cambodia to Thailand and other countries.

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