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

💧 Freshwater Least Concern 🌡️ Subtropical

Bullhead

Cottus gobio Linnaeus, 1758
Max Length
18 cm
Max Weight
Lifespan
10 yrs
Trophic Level
3.2
Depth
2–2 m
Climate
Subtropical
Resilience
Medium
Vulnerability
29.00/100
Typical Length
10 cm
Depth Zone
demersal

📖 Overview

Occurs in cold, clear and fast-flowing water of small stream to medium-sized rivers as well as on gravel or rocky shores of cold lakes and in slightly brackish waters along eastern coast of Baltic coast . Feeds on small bottom invertebrates, mainly insects, crustaceans. Pink to yellow eggs are found in clumps attached to undersides of large stones . Contrary to statements in older literature, eggs and larvae of fishes are not a common food item .

Scientific Name
Cottus gobio
Authority
Linnaeus, 1758
Habitat
Freshwater
Climate
Subtropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
18 cm
Lifespan
10 years
Depth Range
2–2 m
Trophic Level
3.2
Resilience
Medium
Vulnerability
29.00/100
Migration
Potamodromous
Water Temp
1–16 °C

🐟 Physical Description

Dorsal spines (total): 6 - 8; Dorsal soft rays (total): 15 - 18; Anal spines: 0; Anal soft rays: 10 - 13; Vertebrae: 31 - 34. Caudal fin with 13 to 14 rays .: fusiform / normal.

🌀 Behaviour

Behavioural data for Bullhead is currently being reviewed.

🦐 Diet

Diet information for Bullhead is currently being compiled.

🥚 Reproduction

Size at Maturity
4.2cm TL

Spawns once a year for several years in low productivity streams, but exhibits multiple spawning within a season in high productivity environments . Male protects several batches of eggs--deposited below a stone--for about 3 weeks. Larvae are not guarded and may occasionally been eaten . Also Ref. 26506.

🌍 Habitat & Distribution

Freshwater; brackish; demersal; pH range: 7.0 - 7.5; dH range: 10 - ?; potamodromous ; depth range 2 - 2 m . Subtropical; 1°C - 16°C ; 70°N - 40°N, 6°W - 60°E central Italy; Adriatic drainages from Potenza in Italy to Zrmanja in Croatia, except Timavo spring.

🌿 Ecology

Zone Preferences
💧 Freshwater 🌿 Brackish ⬇️ Benthic
Migration
Potamodromous
Trophic Level
3.2±0.2
Food Items

small bottom invertebrates, mainly insects, crustaceans

📐 Morphometrics

Length–Weight Relationship: W = 0.00871 × L3.13 (TL)
Max TL
18cm
Dorsal Spines
7
Dorsal Rays
17
Anal Rays
12
Vertebrae
33

🌡️ Water Parameters & Tolerance

Temperature Range
1–16°C
pH Range
7–7.5

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2023

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
29.00/100
Low vulnerability
Trophic Level
3.2
Predator
Body Shape
Fusiform / normal
Climate Zone
Subtropical
Described By
Linnaeus, 1758

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Bullhead · European Bullhead · Freshwater sculpin · Miller's thumb · Sculpin
🌍BUL glаvoch · Главоч
🌍CES Vranka obecná
🌍CYM Pennau Lletwad · penlletwad
🇩🇰Danish Almindelig ferskvandsulk · Ferskvandsulk · Hvidfinnet ferskvandsulk
🇩🇪German Bullen · Groppe · Gruppe · Kaulkopf · Koppe · Mühlkoppe
🇫🇮Finnish Kivisimppu
🇫🇷French Chabot · Chabot commun · Chabot, Chabot commun
🇭🇺Hungarian Botos kölönte
🇮🇹Italian Scazzone
🌍LIT paprastasis kūjagalvis
🇳🇱Dutch Rivierdonderpad
🌍NNO kvitfinna steinulke
🌍NOB hvitfinnet steinulke
🇳🇴Norwegian Hvitfinnet steinulke
🇵🇱Polish Glowacz bialopletwy · Klujek kamienny · głowacz białopłetwy
🇵🇹Portuguese Escorpião-de-água-doce
🌍RON Zglavoc · Zglavos
🇷🇺Russian подкаменщик обыкновенный
🌍SLV Kapic · kapelj
🌍SME geadgeáhkabiddu
🇪🇸Spanish Cavilat
🌍SRP Pes
🇸🇪Swedish Rysk simpa · Stensimpa
🌍TUR Dereiskorbiti baligi · dere iskorbiti balığı · taşaltı balığı
🌍UKR Бабець звичайний · Бабець європейський · підкаменщик звичайний · широколобка

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) — 78 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet — be the first to log one!

View all observations for Bullhead ↗
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.