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

💧 Freshwater Extinct 🌡️ Temperate

Longjaw cisco

Coregonus alpenae Koelz, 1924
Max Length
45.6 cm
Max Weight
-
Lifespan
-
Trophic Level
3.4
Depth
-
Climate
Temperate
Resilience
Medium
Vulnerability
45.00/100
Typical Length
26.7 cm
Depth Zone
-

📖 Overview

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

Scientific Name
Coregonus alpenae
Authority
Koelz, 1924
Habitat
Freshwater
Climate
Temperate
Body Shape
Fusiform / normal
IUCN Status
EX
Max Length
45.6 cm
Trophic Level
3.4
Resilience
Medium
Vulnerability
45.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal spines (total): 0; Dorsal soft rays (total): 10 - 13; Anal spines: 0; Anal soft rays: 10 - 14; Vertebrae: 56 - 59. Body elongate, compressed laterally but robust. Head heavy, broad and short; eye moderate; snout broad, somewhat rounded; lower jaw heavy, usually projecting beyond the upper jaw, maxillary usually not pigmented, extending posteriorly to beyond the anterior margin of the eye. Overall coloration silvery with pink or purple iridescence, green or blue on back, silvery on sides and white below. Pigmentation on jaws and fins very light.: fusiform / normal.

🌀 Behaviour

Behavioural data for Longjaw cisco is currently being reviewed.

🦐 Diet

Diet information for Longjaw cisco is currently being compiled.

🥚 Reproduction

Reproduction data for Longjaw cisco is currently being compiled.

🌍 Habitat & Distribution

Freshwater; benthopelagic. Temperate North America: Great Lakes basin in lakes Huron and Michigan.

🌿 Ecology

Zone Preferences
💧 Freshwater
Trophic Level
3.4±0.3

📐 Morphometrics

Length–Weight Relationship: W = 0.00575 × L3.22 (TL)
Max TL
45.6cm
Dorsal Rays
12
Anal Rays
12
Vertebrae
58

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Extinct
Assessment Date
1996

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
45.00/100
Moderate vulnerability
Trophic Level
3.4
Predator
Body Shape
Fusiform / normal
Climate Zone
Temperate
Described By
Koelz, 1924

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Longjaw 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Spotted incorrect or outdated data?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.