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🌊 Marine 🌡️ Tropical

Tropical halfbeak

Hyporhamphus affinis Günther, 1866
Max Length
38 cm
Max Weight
-
Lifespan
-
Trophic Level
3.5
Depth
0–6 m
Climate
Tropical
Resilience
High
Vulnerability
29.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Found chiefly around coral reefs and islands but extends a little further from shore than Hyporhamphus (R.) dussumieri which has a similar range . Found in schools . Feeds on zooplankton also small fishes and detritius organic matter . Eggs covered with adhesive filaments to assist in attaching to floating and benthic objects .

Scientific Name
Hyporhamphus affinis
Authority
Günther, 1866
Habitat
Marine
Climate
Tropical
Body Shape
Elongated
Max Length
38 cm
Depth Range
0–6 m
Trophic Level
3.5
Resilience
High
Vulnerability
29.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 0; Dorsal soft rays (total): 14 - 17; Anal spines: 0; Anal soft rays: 15 - 19; Vertebrae: 54 - 59. Body deep blue above, silvery stripe on side, silvery white below; caudal fin bluish, other fins unpigmented; tip and distal half of underside of lower jaw bright carmine red . : elongated; Cross section: oval.

🌀 Behaviour

Behavioural data for Tropical halfbeak 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 0 - 6 m . Tropical East Africa through the Indian Ocean islands to western Australia, New Guinea, Philippines, and islands of Oceania.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3.5±0.48
🐠 Schooling
Food Items

zooplankton (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.00257 × L3.09 (TL)
Max TL
38cm
Dorsal Rays
16
Anal Rays
17
Vertebrae
57

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
29.00/100
Low vulnerability
Trophic Level
3.5
Predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Günther, 1866

🌐 Names & Taxonomy

Scientific Synonyms

Scientific Name Author Year Status
Hemiramphus affinis Günther 1866 Synonym
Hemiramphus australensis Seale 1906 Synonym
Hemirhamphus affinis Günther 1866 Synonym
Hemirhamphus delagoae Barnard 1925 Synonym
Hyporhamphus delagoae Barnard 1925 Synonym

🗺️ Global Occurrence Map

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

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
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