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🌊 Marine 🌡️ Tropical

Pacific halfbeak

Hyporhamphus acutus Günther, 1872
Max Length
30 cm
Max Weight
-
Lifespan
-
Trophic Level
3
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
19.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Pacific halfbeak (Hyporhamphus acutus) is a ray-finned fish of the family Hemiramphidae. It inhabits marine (saltwater) waters in reef-associated environments. This species can reach a maximum total length of 30 cm. With a trophic level of 3, it is a low-level carnivore, feeding on invertebrates and small organisms.

Scientific Name
Hyporhamphus acutus
Authority
Günther, 1872
Habitat
Marine
Climate
Tropical
Body Shape
Elongated
Max Length
30 cm
Latitude
28°S – 16°N
Trophic Level
3
Resilience
High
Vulnerability
19.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal soft rays (total): 15; Anal soft rays: 17 - 18. : elongated.

🌀 Behaviour

Behavioural data for Pacific 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 - ? m. Tropical; 16°N - 28°S Pacific Ocean: confined around oceanic islands, ranging from the Marshalls, Gilberts, and Tonga to the Marquesan and Easter islands (Ref.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3±0.4
🐠 Schooling

📐 Morphometrics

Length–Weight Relationship: W = 0.00257 × L3.09 (TL)
Max TL
30cm
Dorsal Rays
15
Anal Rays
18

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
19.00/100
Low vulnerability
Trophic Level
3
Predator
Body Shape
Elongated
Climate Zone
Tropical
Latitude Range
16°N – 28°S
Described By
Günther, 1872

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Acute Halfbeak · Pacific halfbeak
🇵🇹Portuguese Meia-agulha-de-Rarotonga

Scientific Synonyms

Scientific Name Author Year Status
Hemiramphus furcatus Philippi 1876 Synonym
Hemirhamphus acutus Günther 1872 Synonym
Hemirhamphus arnoldorum Curtiss 1938 Synonym
Hyporhamphus actus Günther 1872 Synonym
Hyporhamphus acutus acutus Günther 1872 Synonym
Odontorhamphus chancellori Weed 1933 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 9 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
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