New 🐟 Mercury Safety Guide & Omega-3 Rankings Updated for 2026. View Omega-3 Rankings →

💧 Freshwater Extinct 🌡️ Temperate

Deepwater cisco

Coregonus johannae Wagner, 1910
Max Length
26.5 cm
Max Weight
-
Lifespan
-
Trophic Level
3.3
Depth
-
Climate
Temperate
Resilience
Medium
Vulnerability
39.00/100
Typical Length
27.5 cm
Depth Zone
demersal

📖 Overview

Overview information for Deepwater cisco is currently being compiled by our editorial team.

Scientific Name
Coregonus johannae
Authority
Wagner, 1910
Habitat
Freshwater
Climate
Temperate
Body Shape
Fusiform / normal
IUCN Status
EX
Max Length
26.5 cm
Trophic Level
3.3
Resilience
Medium
Vulnerability
39.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal spines (total): 0; Dorsal soft rays (total): 9 - 11; Anal spines: 0; Anal soft rays: 10 - 16. Body elongate, moderately compressed laterally. Head relatively long, snout narrow, elongate; mouth terminal, lower jaw usually equal to upper jaw but may be longer or shorter. Overall coloration silvery with pink iridescence. Pale blue or green on back, becoming blue-green on the sides. Ventral surface silvery white. Pigmentation on premaxillae and on top of the head. Fins mainly clear or white, translucent, with lightly scattered pigmentation, pelvic fins immaculate.: fusiform / normal; Cross section: oval.

🌀 Behaviour

Behavioural data for Deepwater cisco is currently being reviewed.

🦐 Diet

Diet information for Deepwater cisco is currently being compiled.

🥚 Reproduction

Reproduction data for Deepwater cisco is currently being compiled.

🌍 Habitat & Distribution

Freshwater; demersal. Temperate North America: Extinct; formerly in the Great Lakes basin, Canada and USA (Ref.

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Trophic Level
3.3±0.3

📐 Morphometrics

Length–Weight Relationship: W = 0.0049 × L3.2 (TL)
Max TL
26.5cm
Dorsal Rays
10
Anal Rays
13

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Extinct
Assessment Date
2016

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
39.00/100
Moderate vulnerability
Trophic Level
3.3
Predator
Body Shape
Fusiform / normal
Climate Zone
Temperate
Described By
Wagner, 1910

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Deepwater cisco ↗
Suggest an Edit

Spotted incorrect or outdated data? Submit a correction and our editorial team will review it. Approved edits go live within 48 hours.

Link to a scientific paper, FishBase, or other authoritative source
Report an Issue

Found a factual error, broken data, or inappropriate content? Let us know and we will investigate promptly.