Glasshead barreleye (Rhynchohyalus natalensis) fish species and information / pictures of Glasshead barreleye - Rhynchohyalus natalensis

Glasshead barreleye (Rhynchohyalus natalensis) fish species information

Scientific Name
Rhynchohyalus natalensis

Common Name
Glasshead barreleye

Biology
Dorsal spines (total): 0; Dorsal soft rays (total): 10-12; Anal spines: 0; Anal soft rays: 7 - 10. Scattered melanophores ventrally; pelvic fins and area around anus black; head translucent (Ref. 6597). Body compressed. Brown in preserved specimen, with black pigment cells scattered in lower half (Ref. 37473).

Classification

Classified By

Gilchrist & von Bonde, 1924

Class

Ray-finned fishes (Actinopterygii)

Order

Smelts (Osmeriformes)

Family

Barreleyes or spookfishes (Opisthoproctidae)

Distribution

Region

Eastern Atlantic

Distribution

Eastern Atlantic: Madeira and off Cape Town, South Africa (Ref. 6597). Western Atlantic: in tropical waters. Western Pacific: off the Ogasawara Islands (Ref. 559), Australia (Ref. 7300), and New Zealand (Ref. 5755). Reported from the Hawaiian Islands (Ref. 58302).

Range

35°N - 49°S, 89°W - 154°W

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

247 m

Depth To - meters

549 m

Zone

pelagic-oceanic

Environment

Marine; pelagic-oceanic; depth range 247 - 549 m (Ref. 58302)

Trophic Level

3.72 s.e. 0.13 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

16.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 1.0000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Unknown

Vulnerability

Low to moderate vulnerability (33 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated