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💧 Freshwater Data Deficient 🐠 Aquarium 🌡️ Tropical

Olomina toothcarp

Brachyrhaphis olomina Meek, 1914
Max Length
6 cm
Max Weight
-
Lifespan
-
Trophic Level
3.2
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
30.00/100
Typical Length
-
Depth Zone
pelagic

📖 Overview

An insectivorous fish generally inhabits waters of low to moderate current velocity; between 10 and 900 m elevation; at temperatures of 19 to 34°C; in surface or midwaters of brooks, streams. Occasionally found in shallow waters of rivers .

Scientific Name
Brachyrhaphis olomina
Authority
Meek, 1914
Habitat
Freshwater
Climate
Tropical
Body Shape
Elongated
IUCN Status
DD
Max Length
6 cm
Trophic Level
3.2
Resilience
High
Vulnerability
30.00/100
Migration
Non-migratory
Water Temp
19–34 °C
Salinity
0–0.5 ppt

🐟 Physical Description

The 10 dark bars on the sides of the body are more pronounced in males. The population in the headwaters of Río Virilla near Santa Ana and Villa Colón are larger and most individuals lack the vertical bars. Interradial membranes on the base of the dorsal fin and the rays are jet black; distal half of the fin yellowish or orange and the margin is black in both sexes. Anal fin is yellow or yellow-orange and has a black blotch from the base to the tip of the fin. Pelvic fins yellowish and caudal distal margin often brilliant yellow .: elongated; Cross section: oval.

🌀 Behaviour

Behavioural data for Olomina toothcarp is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Viviparous 🤰 Viviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
Internal

🌍 Habitat & Distribution

Freshwater; pelagic; non-migratory. Tropical; 19°C - 34°C Central America: Costa Rica.

🌿 Ecology

Zone Preferences
💧 Freshwater 🐟 Pelagic
Migration
Non-migratory
Trophic Level
3.2±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00851 × L3.15 (TL)
Max TL
6cm

🌡️ Water Parameters & Tolerance

Temperature Range
19–34°C
Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
30.00/100
Low vulnerability
Trophic Level
3.2
Predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Meek, 1914

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