Yawning (Poromitra oscitans) fish species and information / pictures of Yawning - Poromitra oscitans

Yawning (Poromitra oscitans) fish species information

Scientific Name
Poromitra oscitans

Common Name
Yawning

Biology
Dorsal spines : 3; Dorsal soft rays : 9-10; Anal spines: 1; Anal soft rays: 7 - 8. This species is distinguished by the following characters: spinulated posterior and lower margins of the praeoperculum with the angular part of the praeoperculum having a non-spinulated notch; insertion of the ventral fins at the level of the vertical of the posterior margin of the pectoral fin insertion, or sometimes slightly shifted anteriad in small specimens; upper jaw extends beyond the vertical of the posterior eye margin; possess the smallest eyes among other species of the genus, 10.7-17.2 times in HL; soft rays on dorsal fin 9-10, in anal fin 7-8; first branchial arch with 23-25 rakers; vertebrae 24-25; pyloric caeca 7.

Classification

Classified By

Ebeling, 1975

Class

Ray-finned fishes (Actinopterygii)

Order

Pricklefishes, Bigscales and Gibberfishes (Stephanoberyciformes)

Family

Bigscale fishes or ridgeheads (Melamphaidae)

Distribution

Region

Indo-Pacific

Distribution

Indo-Pacific: tropical waters.

Range

45°N - 49°S, 79°E - 109°W

Environment

Climate

Deep-water

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

645 m

Depth To - meters

5320 m

Zone

bathyalpelagic

Environment

Marine; bathypelagic; depth range 645 - 5320 m

Trophic Level

3.32 s.e. 0.33 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

8.2 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: of no interest

Vulnerability

Low vulnerability (10 of 100)

Resilience

Unknown

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated