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💧 Freshwater Endangered 🍽️ Edible 🌡️ Tropical

aquarium

Xenurolebias myersi Carvalho, 1971
Max Length
6 cm
Max Weight
-
Lifespan
-
Trophic Level
3.2
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Found in seasonal pools as well as river floodplains . Bottom spawner, 4 months incubation. Is difficult to maintain in aquarium .

Scientific Name
Xenurolebias myersi
Authority
Carvalho, 1971
Habitat
Freshwater
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
EN
Max Length
6 cm
Trophic Level
3.2
Resilience
High
Vulnerability
10.00/100
Migration
Non-migratory
Water Temp
23–28 °C
Salinity
0–0.5 ppt

🔬 Taxonomy

Genus
Xenurolebias
Xenurolebias
Species
aquarium
Xenurolebias myersi

🐟 Physical Description

Dorsal soft rays (total): 12 - 18; Anal soft rays: 19 - 23; Vertebrae: 28 - 29. Xenurolebias myersi differs from all other congeners by having the caudal fin sub-lanceolate, never forming a distinctive tip posteriorly in larger individuals (vs. lanceolate, with a pronounced posterior tip) and distinctive light yellow spots on the distal portion of the anal fin in males (vs. light yellow narrow bars). It is also distinguished from X. cricarensis and X. izecksohni in having fewer dark brown bars on the caudal fin in males (4-6, vs. 7-10 in X. cricarensis and 9-12 in X. izecksohni); from X. izecksohni by having fewer dark grey bars on the flank in females (9-11 vs. 12-13), the dorsal fin, in males, with short light bars on the basal portion and small round light spots on the distal portion (vs. branching bars), absence of oblique short bars on the ventral portion of the caudal fin in males (vs. presence), deeper body (29.0-31.4% SL in males and 30.1-33.9% in females, vs. 27.1-28.5% and 28.5-30.6%, respectively), and longer lower jaw (22.4-24.5% of head length in males and 19.6-21.4% iin females, vs. 18.6-20.9% and 17.7-19.7%, respectively); and from X. pataxo in having wider head (71.5-74.6% SL in males and 74.5-81.1% in females, vs. 65.7-71.1% and 65.8-70.3%, respectively), shorter filaments on the dorsall fin in males (reaching between base and middle of the caudal fin, vs. reaching posterior portion of the caudal fin), and the presence of black spots on the posterior part of the caudal peduncle in females (vs. absence) . : fusiform / normal.

🌀 Behaviour

Behavioural data for aquarium is currently being reviewed.

🦐 Diet

Diet information for aquarium is currently being compiled.

🥚 Reproduction

Reproduction data for aquarium is currently being compiled.

🌍 Habitat & Distribution

Freshwater; benthopelagic; pH range: 6.0 - 6.8; dH range: 8 - ?; non-migratory. Tropical; 23°C - 28°C South America: Atlantic coastal river basins in Brazil.

🌿 Ecology

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

📐 Morphometrics

Length–Weight Relationship: W = 0.01122 × L3.04 (TL)
Max TL
6cm
Dorsal Rays
15
Anal Rays
21
Vertebrae
29

🌡️ Water Parameters & Tolerance

Temperature Range
23–28°C
pH Range
6–6.8
Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Endangered
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.2
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Carvalho, 1971

🍽️ Edibility & Flavour

Nutrition

Detailed nutritional data for aquarium is currently being compiled from USDA FoodData Central.

🔬 Mercury Safety

Mercury data for aquarium has not yet been assigned. Please consult FDA/EPA guidance for general seafood safety advice.

🌿 Sustainability

Best Choice
Healthy stocks, low impact
Good Alternative
Well-managed, minor concerns
Use Caution
Check sourcing and season
Avoid
Overfished or high impact

👥 Community & Contribute

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