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🌊 Marine Data Deficient 🌡️ Temperate

Sunrise dartfish

Navigobius asayake Okamoto & Motomura, 2018
Max Length
4.9 cm
Max Weight
-
Lifespan
-
Trophic Level
3.2
Depth
20–150 m
Climate
Temperate
Resilience
-
Vulnerability
10.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Sunrise dartfish (Navigobius asayake), first described by Okamoto & Motomura, 2018 is a tiny fish. Adults typically reach 4.90 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 20 to 150 metres. It occurs in Temperate waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus. On the IUCN Red List, it is classified as Data Deficient.

Scientific Name
Navigobius asayake
Authority
Okamoto & Motomura, 2018
Habitat
Marine
Climate
Temperate
IUCN Status
DD
Max Length
4.9 cm
Depth Range
20–150 m
Trophic Level
3.2
Vulnerability
10.00/100
Salinity
30–40 ppt

🔬 Taxonomy

Genus
Navigobius
Navigobius
Species
Sunrise dartfish
Navigobius asayake

🐟 Physical Description

Dorsal spines (total): 7; Dorsal soft rays (total): 18 - 19; Anal spines: 1; Anal soft rays: 19; Vertebrae: 26. This species is distinguished by the following set of characters: D2 I,18-19; A I,19; pectoral-fin rays 21-22; gill rakers 5-6 + 13-15; head length 25.1-26.4% SL; eye diameter 8.6-10.0% SL; pelvic-fin length 15.2-16.1% SL. Colouration: yellow stripe extending from behind upper part of eye to beneath first dorsal fin .Cross section: oval.

🌀 Behaviour

Behavioural data for Sunrise dartfish 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 20 - 150 m . Temperate Northwest Pacific: Japan.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3.2±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00389 × L3.12 (TL)
Max TL
4.9cm
Dorsal Spines
7
Dorsal Rays
19
Anal Spines
1
Anal Rays
19
Vertebrae
26

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2024

📊 Population Risk & Fisheries

Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.2
Predator
Climate Zone
Temperate
Described By
Okamoto & Motomura, 2018

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