Benttooth bristlemouth

Cyclothone acclinidens

Fish
IUCN: Least concern

Usual depth250–1,090 m
Water temperature3–29 °C
Best monthsOctober
How commonOccasional

Photo credit: (c) Donald Davesne, alcuni diritti riservati (CC BY), caricata da Donald Davesne · CC BY · iNaturalist

About this species

Cyclothone acclinidens, commonly known as the benttooth bristlemouth, is a species of bristlemouth. It is found in the Atlantic, Pacific, and Indian Oceans.

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

Where and when

Where it has been recorded

Worldwide

Loading the map

Best months

Worldwide (open data)

January: 33 records
February: 49 records
March: 18 records
April: 74 records
May: 62 records
June: 47 records
July: 133 records
August: 130 records
September: 97 records
October: 250 records
November: 128 records
December: 27 records

Depth and water temperature

Depth

Mostly recorded at 250–1,090 m · Deepest record: 4,113.5 m

0–10 m: 1 records
10–20 m: 1 records
20–30 m: 2 records
30–40 m: 1 records
40–50 m: 0 records
50–60 m: 0 records
60–70 m: 0 records
70–80 m: 2 records
80–90 m: 0 records
90–100 m: 0 records
100–110 m: 0 records
110+ m: 288 records

Water temperature

Recorded in surface water of 3–29 °C

2–4 °C: 1 records
4–6 °C: 0 records
6–8 °C: 0 records
8–10 °C: 0 records
10–12 °C: 2 records
12–14 °C: 37 records
14–16 °C: 44 records
16–18 °C: 140 records
18–20 °C: 132 records
20–22 °C: 42 records
22–24 °C: 22 records
24–26 °C: 24 records
26–28 °C: 29 records
28–30 °C: 14 records

Photos

Names and classification

English: Benttooth bristlemouth, benttooth bristlemouth, Bent - tooth bristlemouth, Bent-tooth Bristlemouth

Names in 3 more languages

Spanish: Boca Cerdosa
French: Cyclothone dentu
Japanese: Senonihadaka, センオニハダカ

Other scientific names: Cyclothone acclinideus, Cyclothone pseudoacclinidens

Similar species

Showy bristlemouth
Cyclothone signata
Albino anglemouth
Cyclothone alba
Deep-water bristlemouth
Cyclothone atraria
Spottail anglemouth
Cyclothone braueri
Veiled anglemouth
Cyclothone microdon
Bicolored bristlemouth
Cyclothone pallida

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).
3,788 open-data records from 1888 to 2025.
Species data updated November 1, 2026.

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