Animal Species:Soft Leftvent Angler, Haplophryne mollis (Brauer, 1902)

The Soft Leftvent Angler is named for its asymmetrically placed vent.  The species is highly sexually dimorphic.  Mature males parasitise the much larger females.

Female Soft Leftvent Angler, Haplophryne mollis

Mark McGrouther © Norfanz founding parties

Standard Common Name

Soft Leftvent Angler

Alternative Name/s

Soft Leafvent Angler

Identification

The Soft Leftvent Angler is a sexually dimorphic species. Females have rounded, unpigmented bodies. They have several spines on the head and a rounded esca on the snout.

Size range

Females grow to around 8 cm in length, but males only grow to about 2 cm.

Distribution

Soft Leftvent Anglers occurs in deep tropical and subtropical marine waters of all oceans. In Australia specimens have been trawled from off central to southern New South Wales and east of Tasmania, but the species is almost certainly more widespread.

The map below shows the Australian distribution of the species based on public sightings and specimens in Australian Museums.  Source: Atlas of Living Australia.

Haplophryne mollis

Distribution by collection data

Ozcam map of Soft Leftvent Angler specimens in the Australian Museums.

What does this mean?

Mating and reproduction

Mature males are usually seen permanently attached to females. When a free-living male encounters a female, it bites the female and the skin of his mouth eventually fuses with that of the female. The male then becomes parasitic on the female.

Classification

Species:
mollis
Genus:
Haplophryne
Family:
Linophrynidae
Order:
Lophiiformes
Class:
Actinopterygii
Subphylum:
Vertebrata
Phylum:
Chordata
Kingdom:
Animalia

What does this mean?

References

  1. Bertelsen, E., & Pietsch, T.W. 1983. The Ceratioid Anglerfishes of Australia. Records of the Australian Museum. 35: 77-99.
  2. Paxton, J.R., D.F. Hoese, G.R. Allen & J.E. Hanley. 1989. Zoological Catalogue of Australia Vol.7. Pisces Petromyzontidae to Carangidae. Canberra: Australian Biological Resources Survey. Pp. i-xii, 1-665.
  3. Yearsley, G.K., Last, P.R. & D.F. Hoese. 2006. Standared Names of Australian Fishes. CSIRO Marine and Atmospheric Research Paper 009. Pp. 65.


Mark McGrouther , Collection Manager, Ichthyology
Last Updated:

Tags fishes, ichthyology, Soft Leafvent Angler, Haplophryne mollis, Linophrynidae, Soft Leftvent Angler, sexually dimorphic, round, unpigmented body, < 10 cm, deepsea, tropical water, subtropical water, marine, males become parasitic,