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💧 Freshwater Critically Endangered 🌡️ Temperate

Pygmy sculpin

Cottus paulus Williams, 2000
Max Length
4.5 cm
Max Weight
-
Lifespan
2 yrs
Trophic Level
3.1
Depth
-
Climate
Temperate
Resilience
High
Vulnerability
17.00/100
Typical Length
3 cm
Depth Zone
demersal

📖 Overview

Pygmy sculpin (Cottus paulus), first described by Williams, 2000 is a tiny fish in the family Cottidae (order Perciformes). Adults typically reach 4.50 cm in maximum length. Reported lifespan reaches approximately 2 years. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Temperate waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus. On the IUCN Red List, it is classified as Critically Endangered.

Scientific Name
Cottus paulus
Authority
Williams, 2000
Habitat
Freshwater
Climate
Temperate
IUCN Status
CR
Max Length
4.5 cm
Lifespan
2 years
Trophic Level
3.1
Resilience
High
Vulnerability
17.00/100
Migration
Non-migratory
Salinity
0–0.5 ppt

🐟 Physical Description

Physical description for Pygmy sculpin is currently being compiled.

🌀 Behaviour

Behavioural data for Pygmy sculpin 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; non-migratory . Temperate; 34°N - 33°N North America: known only from Coldwater Spring (Coosa River system), Calhoun County in Alabama, USA.

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Migration
Non-migratory
Trophic Level
3.1±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00832 × L3.16 (TL)
Max TL
4.5cm

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Critically Endangered
Assessment Date
2011

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
17.00/100
Low vulnerability
Trophic Level
3.1
Predator
Climate Zone
Temperate
Described By
Williams, 2000

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