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Nutcracker prickleback (Bryozoichthys lysimus) fish species and information / pictures of Nutcracker prickleback - Bryozoichthys lysimus

Nutcracker prickleback (Bryozoichthys lysimus) fish species information

Scientific Name
Bryozoichthys lysimus

Common Name
Nutcracker prickleback

Biology
Dorsal spines (total): 61 - 66; Dorsal soft rays (total): 0; Anal spines: 1; Anal soft rays: 47 - 50. Dorsal side of head with numerous dermal cirri; scales on body not extending forward beyond origin of dorsal fin; anterior chin with a pair of small cirri (Ref. 559).

Classification

Classified By

Jordan & Snyder, 1902

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Pricklebacks (Stichaeidae)

Distribution

Region

North Pacific

Distribution

North Pacific: northern Hokkaido, Japan to the northern Sea of Japan, the Okhotsk and Bering seas, to Gulf of Alaska (Ref. 559). Reported from South Korea (Ref. 77001).

Range

Unknown

Environment

Climate

Boreal

Water Temperature From

1 °C

Water Temperature To

4 °C

Depth From - meters

45 m

Depth To - meters

490 m

Zone

demersal

Environment

Marine; demersal; depth range 45 - 490 m (Ref. 50550), usually 100 - 200 m (Ref. 56593)

Trophic Level

3.5 s.e. 0.44 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

27.0 cm

Common Length

22.3 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

Moderate vulnerability (42 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