Scientific Name
Hypsagonus quadricornis

Common Name
Fourhorn poacher

Biology
Dorsal spines (total): 8 - 11; Dorsal soft rays (total): 5-7; Anal spines: 0; Anal soft rays: 8 - 11; Vertebrae: 35 - 37. Lower lobe of pectoral fin with 7 to 8 free rays. A barbel is present on the tip of the snout. Dorsum highly elevated at nape. Branchial membrane free from isthmus. Supralateral and infralateral plates attached to each other on lateral line. Dorsal fins close to each other. Lateral line plates less than 15.

Classification

Classified By

Cuvier, 1829

Class

Ray-finned fishes (Actinopterygii)

Order

Scorpionfishes and Flatheads (Scorpaeniformes)

Family

Poachers (Agonidae)

Distribution

Region

North Pacific

Distribution

North Pacific: Sea of Okhotsk, Sea of Japan (Ref. 559), Kuril Islands (Ref. 56580) and the Bering Sea to Puget Sound, Washington, USA.

Range

62°N - 46°N, 171°E - 121°W

Environment

Climate

Temperate

Water Temperature From

1 °C

Water Temperature To

9 °C

Depth From - meters

0 m

Depth To - meters

452 m

Zone

demersal

Environment

Marine; demersal; non-migratory; depth range 0 - 452 m (Ref. 50550), usually 100 - 150 m (Ref. 56580)

Trophic Level

3.19 s.e. 0.37 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

12.0 cm

Common Length

10.0 cm

Phylogenetic Diversity Index

PD50 = 0.7500 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries:

Vulnerability

Low vulnerability (24 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