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Rough-toothed Dolphin
Steno bredanensis
Abstract
Rough-toothed Dolphin Steno bredanensis has most recently been assessed for The IUCN Red List of Threatened Species in 2023. Steno bredanensis is listed as Near Threatened under criteria C2a(i); D1.
The Red List Assessment
Gauffier, P. & Kerem, D. 2023. Steno bredanensis (Europe assessment). The IUCN Red List of Threatened Species 2023: e.T20738A213294674. Accessed on 03 November 2026.
Language
English
Last assessed
24 January 2023
Scope of assessment
Europe
Population trend
Unknown
Number of mature individuals
1,560-2,000
Habitat and ecology
Marine Oceanic
Geographic range
-
Extant (seasonality uncertain)
-
Extant (resident)
-
Possibly Extant (seasonality uncertain)
Assessment Information
Europe Assessment
IUCN Red List Category and Criteria - Europe Assessment
Near Threatened C2a(i); D1
Date assessed
24 January 2023
Year published
2023
Assessment Information in detail
Geographic Range
Native
Extant (resident)
Spain (Canary Is.)
Extant (seasonality uncertain)
Cyprus; Egypt (Egypt (African part)); Greece (Greece (mainland)); Israel; Italy (Italy (mainland), Sicilia); Lebanon; Libya; Malta; Portugal (Madeira)
Possibly Extant (seasonality uncertain)
Egypt (Sinai); Greece (East Aegean Is., Kriti); Syrian Arab Republic; Tunisia; Türkiye (Türkiye-in-Asia, Türkiye-in-Europe)
Extant & Vagrant (seasonality uncertain)
Netherlands; Portugal (Azores); Spain (Spain (mainland))
Presence Uncertain & Vagrant
France (Corsica)
Number of locations
Upper depth limit
0 metres
Lower depth limit
400 metres
Geographic Range in detail
Population
Current population trend
Number of mature individuals
1,560-2,000
Population severely fragmented
No
Continuing decline of mature individuals
Unknown
Population in detail
Habitat and Ecology
System
Habitat type
Generation length (years)
Congregatory
Movement patterns
Unknown
Continuing decline in area, extent and/or quality of habitat
Habitat and Ecology in detail
Threats
Energy production & mining
- Oil & gas drilling
Biological resource use
- Fishing & harvesting aquatic resources
Human intrusions & disturbance
- Recreational activities
- War, civil unrest & military exercises
Invasive and other problematic species, genes & diseases
- Problematic native species/diseases
Pollution
- Industrial & military effluents
- Agricultural & forestry effluents
- Excess energy
Threats in detail
Use and Trade
Use and Trade in detail
Conservation Actions
In-place research and monitoring
- Action Recovery Plan : No
- Systematic monitoring scheme : No
In-place land/water protection
- Area based regional management plan : No
- Occurs in at least one protected area : Yes
In-place education
- Included in international legislation : Yes
- Subject to any international management / trade controls : Yes
Conservation Actions in detail
Bibliography
Red List Bibliography
External Data
Images and External Links
Images and External Links in detail
CITES Legislation from Species+
Data source
The information below is from the Species+ website.
CITES Legislation from Species+ in detail
Ex situ data from Species360
Data source
The information below is from Species360's Zoological Information Management System (ZIMS)
Ex situ data from Species360 in detail
Studies and Actions from Conservation Evidence
Data source
The information below is from the Conservation Evidence website.
