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Blind Bristlemouth

Cyclothone kobayashii

  • Fish
  • IUCN: Least concern
  • Usual depth432–1,038 m
  • Water temperature14–26 °C
  • Best monthsFebruary, March, and December
  • How commonRare
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About this species

Cyclothone kobayashii, commonly known as the Kobayashi's bristlemouth, is a species of ray-finned fish in the genus Cyclothone. It is found in the Southern Ocean.

Text from the Wikipedia article “Cyclothone kobayashii”, licensed CC BY-SA 4.0. Read the article

Where and when

Where it has been recorded

Worldwide

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Best months

Worldwide (open data)

  • January: 1 records
  • February: 2 records
  • March: 3 records
  • April: 1 records
  • May: 0 records
  • June: 0 records
  • July: 0 records
  • August: 0 records
  • September: 0 records
  • October: 1 records
  • November: 1 records
  • December: 2 records

Depth and water temperature

Depth

Mostly recorded at 432–1,038 m · Deepest record: 1,037.5 m

  • 430–440 m: 1 records
  • 440–450 m: 0 records
  • 450–460 m: 0 records
  • 460–470 m: 0 records
  • 470–480 m: 0 records
  • 480–490 m: 0 records
  • 490–500 m: 0 records
  • 500–510 m: 0 records
  • 510–520 m: 0 records
  • 520–530 m: 0 records
  • 530–540 m: 0 records
  • 540+ m: 4 records

Water temperature

Recorded in surface water of 14–26 °C

  • 12–14 °C: 1 records
  • 14–16 °C: 0 records
  • 16–18 °C: 2 records
  • 18–20 °C: 1 records
  • 20–22 °C: 5 records
  • 22–24 °C: 0 records
  • 24–26 °C: 2 records

Names and classification

English
Blind Bristlemouth, Kobayashi's Bristlemouth, Kobayashi’s Bristlemouth

Other scientific names: Cyclothone sumiae

Similar species

Sources and credits

Names and taxonomy: WoRMS (CC BY 4.0) and the GBIF Backbone (CC BY 4.0). Photos: iNaturalist observers, each under the licence shown (CC0, CC BY or CC BY-SA).

  • Depth, temperature, months and maps: records from OBIS and GBIF under CC0 or CC BY.
  • Descriptions: Wikipedia, licensed CC BY-SA, each linked to its article.
  • Conservation status as published by GBIF (IUCN Red List).
  • 30 open-data records from 1971 to 2022.
  • Species data updated November 1, 2026.

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