Overview

Comprehensive Description

Biology

One of the smallest freshwater fishes.
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Distribution

Range Description

Described from Dayame Chaung on the eastern side of the Bago Yoma mountain range in Myanmar (Roberts 1986). Subsequently also found in additional streams on the southeastern and southern end of Bago Yoma (R. Britz pers. comm.). Known from around six localities.
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Bago Yoma, southern Myanmar.
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Asia: Myanmar.
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Physical Description

Size

Max. size

1.1 cm SL (female)
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
Wide lowland streams at the foot of the mountain range with a constant flow, a sandy to muddy bottom and usually turbid water. They stay in the cooler areas of the stream, that is, closer to the banks or in deeper cooler water layers. This is the smallest freshwater fish in the region, maturing at 10-11 mm SL.

Systems
  • Freshwater
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Environment

benthopelagic; freshwater
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Danionella translucida

The following is a representative barcode sequence, the centroid of all available sequences for this species.


There are 2 barcode sequences available from BOLD and GenBank.  Below is a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.  See the BOLD taxonomy browser for more complete information about this specimen and other sequences.

GGCACCTTATATTTATTATTTGGTGGTTGGGCTGGGATAGTAGGAACAGGACTA---AGCCTCCTGATTCGTGCTGAACTTGCTCAGTCTGGCGCCCTTCTTGAAGAC---AATCAAATATATAATGTTATTGTCACTGCCCATGCATTTGTAATGATTTTTTTTATAGTTATACCTATCCTTATTGGCGGTTTTGGTAATTGACTTGTTCCTTTAATA---ATTGCCGCTCCTGATATGGCATTTCCCCGAATAAACAACATGAGCTTCTGATTATTACCCCCATCACTTTTCCTCTTACTACTATCATCCGGTGTTGAGGCGGGTGCAGGAACAGGATGAACAGTGTATCCTCCCCTTGCTGGCAATCTCGCGCATGCGGGTCCCTCAGTAGATTTG---ACAATTTTTTCTTTACATTTGGCGGGTGTTTCATCCATCTTAGGGGCTATTAATTTTATTACAACAACTATCAACATAAAACCTCCAGCTCTTTCCCAATACCAAACACCTTTATTTGTCTGAGCTGTAATAATCACGGCAGTACTTTTATTATTATCTCTTCCTGTCTTGGCAGGG---GGAATTACAATACTCCTAACAGATCGAAATTTAAATACTACCTTTTTTGACCCCGCAGGTGGTGGTGATCCAATTTTATATCAGCACCTTTTCTGATTCTTT
-- end --

Download FASTA File
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Statistics of barcoding coverage: Danionella translucida

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Specimens with Barcodes: 2
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2010

Assessor/s
Britz, R.

Reviewer/s
Allen, D., Rema Devi, K.R., Arunachalam, M., Dahanukar, N. & Daniel, B.A.

Contributor/s
Molur, S.

Justification
Danionella translucida was described from Dayame Chaung on the eastern side of the Bago Yoma mountain range in Myanmar and subsequently also found in additional streams on the southeastern and southern end of Bago Yoma. It is currently found in lowland streams at the foot of the mountain range, and there are currently no known threats and the species is not utilised for food. It is therefore assessed as Least Concern
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Population

Population
Where they occur they are abundant, with several hundreds easily caught with a dip net within an hour (R. britz pers. comm.).

Population Trend
Unknown
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Threats

Major Threats
No threats are known at present, but the potential impact of dams within the region need to be studied.
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Least Concern (LC)
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Management

Conservation Actions

Conservation Actions
Further information on the species range and distribution is required, especially in higher altitude streams within the currently known range, and there is no potential threats to the species.
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Wikipedia

Danionella translucida

Danionella translucida is an extremely small (1.1 cm long) species of cyprinid fish endemic to Myanmar. When described, it was considered to be the smallest freshwater vertebrate. It was collected from the roots of floating aquatic plants in a slow-flowing, shallow stream (maximum depth 1 m) in the Pegu Division of Myanmar. It was found alongside Danio, Microrasbora, Erethistes, and Oryzias species. Observed in life, D. translucida is almost perfectly transparent except for its eyes. It has a distinctive pattern of melanophores. There are no melanophores on the dorsal surface except on the head over the posterior part of the brain. On the posterior half of the body, there a few melanophores following the horizontal midline. The sides and underside of the abdomen have melanophores. A double row of melanophores is present on the underside of the fish from the isthmus of the gills to the pelvic fins. Eggs in D. translucida has been found to range in size from about .3–.6 mm (.011–.024 in) in diameter, with ripe eggs being at least .5 mm (.019 in) in diameter. Females carried anywhere from 3 to 8 or 10 eggs. Compared to the body of the fish, these eggs are relatively large.[1]

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