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🌊 Marine Least Concern 🌡️ Subtropical

Pearl fish

Carapus acus Brünnich, 1768
Max Length
20.8 cm
Max Weight
Lifespan
Trophic Level
4
Depth
1–150 m
Climate
Subtropical
Resilience
Vulnerability
11.00/100
Typical Length
Depth Zone
demersal

📖 Overview

Common species . Adults typically live as commensals in the gut of shallow-water holothurians, Holothuria tubulosa and Stichopus regalis (although some deep-water records exist, see Ref. 6347). Prejuveniles (tenuis larvae) probably inhabit the same host species while the vexillifer and egg-rafts are planktonic. The fish may partly protrude or entirely leave its host at night to feed on small fish and benthic invertebrates. Reproduction noted in July-September. .

Scientific Name
Carapus acus
Authority
Brünnich, 1768
Habitat
Marine
Climate
Subtropical
IUCN Status
LC
Max Length
20.8 cm
Depth Range
1–150 m
Latitude
15°S – 42°N
Trophic Level
4
Vulnerability
11.00/100
Migration
Non-migratory
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal soft rays (total): 37 - 39. Eel-like, moderate to shallow body depth; cardiform teeth present but restricted to upper jaw symphysis; swim bladder constricted forming two chambers; lacking enlarged dentary or premaxillary fangs, dentary diastema, pelvic fins and swim bladder rockerbone . Possesses a free, movable maxilla .: eel-like; Cross section: compressed.

🌀 Behaviour

Behavioural data for Pearl fish is currently being reviewed.

🦐 Diet

Diet information for Pearl fish is currently being compiled.

🥚 Reproduction

It is not yet established whether spawning is seasonal or sporadic in carapids. Eggs elliptical and planktonic .

🌍 Habitat & Distribution

Marine; demersal; non-migratory; depth range 1 - 150 m . Subtropical; 42°N - 15°S south to Ascension Island.

🌿 Ecology

Zone Preferences
🌊 Marine ⬇️ Benthic
Migration
Non-migratory
Trophic Level
4±0.63
Food Items

small fish and benthic invertebrates

📐 Morphometrics

Length–Weight Relationship: W = 0.00102 × L3.06 (TL)
Max TL
20.8cm
Dorsal Rays
38

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2014

📊 Population Risk & Fisheries

Fishing Vulnerability
11.00/100
Low vulnerability
Trophic Level
4
Apex / Top predator
Climate Zone
Subtropical
Latitude Range
42°N – 15°S
Described By
Brünnich, 1768

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Pearl fish · Pearlfish
🌍CES jehlička obecná
🇩🇪German Nadelfisch
🌍ELL Μαργαριτόψαρο
🇫🇮Finnish neulakala
🇫🇷French Aurin · Fierasfer
🇮🇹Italian Galiotto
🌍MLT Huta tal-hjar
🇵🇱Polish Karap europejski
🇵🇹Portuguese Peixe-perola-do-Atlântico
🇷🇺Russian Средиземноморский карапус
🌍SLV Strmorinec
🇪🇸Spanish Rubioca
🌍SQI Bishtholla · peshku bishthollë
🌍TUR Akdeniz inci balığı · inci baligi

Scientific Synonyms

Scientific Name Author Year Status
? imberbis Cuvier 1815 Synonym
Carapus birpex Arnold 1956 Synonym
Carapus cuspis Arnold 1956 Synonym
Carapus imberbis Cuvier 1815 Synonym
Diaphasia acus Brünnich 1768 Synonym
Encheliophis tenuis Putnam 1874 Synonym
Fierasfer acus Brünnich 1768 Synonym
Fierasfer fontanesii Risso 1810 Synonym
Fierasfer imberbis Cuvier 1815 Synonym
Fierasfer maculata Swainson 1839 Synonym
Gymnotus acus Brünnich 1768 Synonym
Notopterus fontanesii Risso 1810 Synonym
Ophidium fierasfer Risso 1827 Synonym
Ophidium imberbe Cuvier 1815 Synonym
Porobronchus linearis Kaup 1860 Synonym
Vexillifer dephilippii Gasco 1870 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) — 685 records indexed .

Occurrence density from GBIF View GBIF records ↗

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