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

🌊 Marine Least Concern 🌡️ Tropical

Longnose pygmy shark

Heteroscymnoides marleyi Fowler, 1934
Max Length
29 cm
Max Weight
Lifespan
Trophic Level
4.1
Depth
0–502 m
Climate
Tropical
Resilience
Low
Vulnerability
23.00/100
Typical Length
Depth Zone

📖 Overview

Probably oceanic . The holotype was caught off a beach, but a second specimen was taken in the Atlantic at night between the surface and 502 m . Food unknown but may subsist on pelagic fish and invertebrates . Probably ovoviviparous with very few young .

Scientific Name
Heteroscymnoides marleyi
Authority
Fowler, 1934
Habitat
Marine
Climate
Tropical
Body Shape
Elongated
IUCN Status
LC
Max Length
29 cm
Depth Range
0–502 m
Trophic Level
4.1
Resilience
Low
Vulnerability
23.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 0; Anal spines: 0. A cylindrical, dwarf dogfish shark with a long bulbous snout, small round eyes, and small gill slits; caudal fin paddle-shaped . Dark brown with conspicuous light-edged fins . Ventral surface covered with minute photophores .: elongated.

🌀 Behaviour

Behavioural data for Longnose pygmy shark is currently being reviewed.

🦐 Diet

Diet information for Longnose pygmy shark is currently being compiled.

🥚 Reproduction

Distinct pairing with embrace .

🌍 Habitat & Distribution

Marine; benthopelagic; depth range 0 - 502 m . Tropical; 14°S - 30°S Southeast Atlantic: near Ascension Island.

🌿 Ecology

Zone Preferences
🌊 Marine
Trophic Level
4.1±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00309 × L3.14 (TL)
Max TL
29cm

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
23.00/100
Low vulnerability
Trophic Level
4.1
Apex / Top predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Fowler, 1934

🌐 Names & Taxonomy

Language Common Names
🇬🇧English longnose pygmy shark
🌍CES světloun Marleyův
🇩🇪German Langnasen-Pygmäenhai
🇫🇷French Squale Mignon
🇮🇹Italian Squalo pigmeo nasolungo
🇯🇵Japanese ナガハナコビトザメ
🇷🇺Russian Длинноносая карликовая колючая акула
🇪🇸Spanish Tollo Pigmeo Trompudo

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) — 2 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 Longnose pygmy shark ↗
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.