Species learning profile
Common marine hatchetfish
Argyropelecus hemigymnus
Common marine hatchetfish (Argyropelecus hemigymnus) is a saltwater fish associated with deep sea habitat in Global. Downward-facing light organs match the faint light from above.
Your learning progress stays on this device.
At a glance
- Eau
- Eau salée
- Habitat
- Mer profonde
- Longueur maximale
- 4 cm
- Répartition
- Monde entier
- Famille
- Sternoptychidae
- Ordre
- Stomiiformes
Observe
How to identify Common marine hatchetfish
- Downward-facing light organs match the faint light from above.
- Guide context: deep sea habitat in Global.
- Reported maximum length: 4 cm — about hand-length or smaller. Maximum is not the same as typical adult size.
Field note: color, size, and markings can change with age, sex, season, depth, and lighting. Use several traits together.
Place and pattern
Where it lives—and how it behaves
Habitat and range
This species is associated with deep sea habitat across Global. Food is scarce and sunlight is absent or faint, favoring energy-saving movement and specialized senses.
Behavior
Migrates vertically and uses counterillumination
Food-web connections
What it eats and why it matters
Diet
Zooplankton and tiny crustaceans.
Ecological role
Small but abundant prey in deep pelagic food webs.
Remember
One fact worth keeping
Common marine hatchetfish peut atteindre environ 4 cm et vit souvent près de Mer profonde.
Think like a conservationist
A conservation lens
Deep-sea animals often grow slowly, and recovery can be difficult after habitat disturbance or heavy fishing.
This habitat lens is not a current population-status assessment. Status can differ among regions and change as new assessments are published; follow the reference links and local fisheries or wildlife agencies for current decisions.
Recall
Quick knowledge check
Which habitat is most closely associated with Common marine hatchetfish in this guide?
Keep exploring
References and further reading
Fishdle summarizes stable identification and ecology concepts in plain language. Taxonomy and population knowledge continue to change, so use primary assessments and regional authorities for conservation or management decisions.
Make connections