Scientific Name
Holtbyrnia macrops

Common Name
Bigeye searsid

Biology
Bathypelagic to benthopelagic in the northern parts of range, occurring from 300-1,000 m in the daytime, but as shallow as 100-120 m at night (Ref. 4461).

Classification

Classified By

Maul, 1957

Class

Ray-finned fishes (Actinopterygii)

Order

Smelts (Osmeriformes)

Family

Tubeshoulders (Platytroctidae)

Distribution

Region

Eastern Atlantic

Distribution

Eastern Atlantic: Denmark Strait (Ref. 6682), southern Iceland and Bay of Biscay to South Africa.

Range

70°N - 35°S, 34°W - 20°E

Environment

Climate

Deep-water

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

100 m

Depth To - meters

1000 m

Zone

benthopelagic

Environment

Marine; benthopelagic; depth range 100 - 1000 m (Ref. 4461)

Trophic Level

3.25 s.e. 0.39 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

20.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5020 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Unknown

Vulnerability

Low vulnerability (14 of 100)

Resilience

High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated