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💧 Freshwater 🌡️ Tropical

Knaacks cory

Hoplisoma knaacki Tencatt & Evers, 2016
Max Length
4 cm
Max Weight
-
Lifespan
-
Trophic Level
3
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Knaacks cory (Hoplisoma knaacki), first described by Tencatt & Evers, 2016 is a tiny fish. Adults typically reach 4.00 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus.

Scientific Name
Hoplisoma knaacki
Authority
Tencatt & Evers, 2016
Habitat
Freshwater
Climate
Tropical
Body Shape
Fusiform / normal
Max Length
4 cm
Trophic Level
3
Resilience
High
Vulnerability
10.00/100
Salinity
0–0.5 ppt

🔬 Taxonomy

Genus
Hoplisoma
Hoplisoma
Species
Knaacks cory
Hoplisoma knaacki

🐟 Physical Description

Dorsal spines (total): 2; Dorsal soft rays (total): 7 - 8; Anal soft rays: 7 - 9. Corydoras knaacki is distinguished from its congeners by having the following combination of characters: a longitudinal black stripe along midline of flank; short mesethmoid, with anterior portion smaller than 50% of the bone length; serrations on posterior margin of pectoral spine directed towards the tip of the spine; dorsal fin with the region of the first branched ray, including membrane, with black pigmentation, the remaining areas with irregular black blotches; lacking a vertically elongated black blotch across the eyes; snout with conspicuously rounded moderately-developed black spots; and ventral expansion of infraorbital 1 moderately developed .: fusiform / normal.

🌀 Behaviour

Behavioural data for Knaacks cory is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; demersal. Tropical South America: Río Madre de Dios basin, Peru.

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Trophic Level
3±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.0182 × L3.02 (TL)
Max TL
4cm
Dorsal Spines
2
Dorsal Rays
8
Anal Rays
8

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Tencatt & Evers, 2016

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