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🌊 Marine Least Concern 🌡️ Tropical

Squarenose unicornfish

Naso mcdadei Johnson, 2002
Max Length
75 cm
Max Weight
-
Lifespan
-
Trophic Level
2.7
Depth
5–65 m
Climate
Tropical
Resilience
Low
Vulnerability
58.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Inhabits steep drop-offs of offshore coral reefs or rocky outcrops . Feeds on algae and larger zooplankton . Solitary or in groups . Minimum depth from Ref. 58018.

Scientific Name
Naso mcdadei
Authority
Johnson, 2002
Habitat
Marine
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
75 cm
Depth Range
5–65 m
Trophic Level
2.7
Resilience
Low
Vulnerability
58.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 5; Dorsal soft rays (total): 28 - 31; Anal spines: 2; Anal soft rays: 26 - 29. : fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Squarenose unicornfish is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring-summer
Spawn Location
Pelagic
Fertilization
External

🌍 Habitat & Distribution

Marine; reef-associated; depth range 5 - 65 m . Tropical; 10°S - 22°S, 114°E - 124°E West Pacific: East Africa to the Great Barrier Reef, including the Timor Sea.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
2.7±0.31
🧍 Solitary
Food Items

algae and larger zooplankton (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.01995 × L2.92 (TL)
Max TL
75cm
Dorsal Spines
5
Dorsal Rays
30
Anal Spines
2
Anal Rays
28

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2010

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
58.00/100
High vulnerability
Trophic Level
2.7
Omnivore / Planktivore
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Johnson, 2002

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Squarenose Unicornfish
🏳️Catalan Peix unicorn de nas quadrat
🇮🇹Italian Pesce unicorno muso quadrato · Pesce unicorno naso quadrato · Pesce unicorno squadrato
🇯🇵Japanese Masakaritenguhagi · マサカリテングハギ
🇵🇹Portuguese Peixe-unicórnio-de-nariz-quadrado
🇪🇸Spanish Pez Unicornio de Nariz Cuadrada

🦠 Common Diseases

The following diseases are known to affect Squarenose unicornfish.

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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