New 🐟 Mercury Safety Guide & Omega-3 Rankings Updated for 2026. View Omega-3 Rankings →

Diadromous Least Concern 🌡️ Tropical

Duckbill sleeper

Butis butis Hamilton, 1822
Max Length
15 cm
Max Weight
-
Lifespan
-
Trophic Level
4
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Inhabits brackish mangrove estuaries and lower reaches of freshwater streams, usually on mud bottoms . Usually found in lagoons and estuaries, particularly where there is vegetation . Occurs frequently in mangrove swamps . Occasionally ascends rivers . Feeds mainly on small fishes and crustaceans . Marketed fresh .

Scientific Name
Butis butis
Authority
Hamilton, 1822
Habitat
Diadromous
Climate
Tropical
Body Shape
Elongated
IUCN Status
LC
Max Length
15 cm
Trophic Level
4
Resilience
High
Vulnerability
10.00/100
Migration
Amphidromous
Water Temp
22–28 °C
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 7; Dorsal soft rays (total): 8; Anal spines: 1; Anal soft rays: 8 - 9. Dark longitudinal lines on body; caudal fin black with light margin dorsally; pectoral base with 1-2 black spots .: elongated.

🌀 Behaviour

Behavioural data for Duckbill sleeper is currently being reviewed.

🦐 Diet

Diet information for Duckbill sleeper is currently being compiled.

🥚 Reproduction

Reproduction data for Duckbill sleeper is currently being compiled.

🌍 Habitat & Distribution

Marine; freshwater; brackish; demersal; pH range: 7.0 - 8.0; dH range: 9 - 19; amphidromous . Tropical; 22°C - 28°C

🌿 Ecology

Zone Preferences
🌊 Marine 💧 Freshwater 🌿 Brackish ⬇️ Benthic
Migration
Amphidromous
Trophic Level
4±0.66
Food Items

small fishes and crustaceans (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.00851 × L3.17 (TL)
Max TL
15cm
Dorsal Spines
7
Dorsal Rays
8
Anal Spines
1
Anal Rays
9

🌡️ Water Parameters & Tolerance

Temperature Range
22–28°C
pH Range
7–8
Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2016

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
4
Apex / Top predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Hamilton, 1822

🌐 Names & Taxonomy

Scientific Synonyms

Scientific Name Author Year Status
Cheilodipterus butis Hamilton 1822 Synonym
Eleotris butis Hamilton 1822 Synonym
Elestris butis Hamilton 1822 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 43 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Duckbill sleeper ↗
Suggest an Edit

Spotted incorrect or outdated data? Submit a correction and our editorial team will review it. Approved edits go live within 48 hours.

Link to a scientific paper, FishBase, or other authoritative source
Report an Issue

Found a factual error, broken data, or inappropriate content? Let us know and we will investigate promptly.