Bullhead scorpionfish (Scorpaena bulacephala) fish species and information / pictures of Bullhead scorpionfish - Scorpaena bulacephala

Bullhead scorpionfish (Scorpaena bulacephala) fish species information

Scientific Name
Scorpaena bulacephala

Common Name
Bullhead scorpionfish

Biology
Dorsal soft rays (total): 9. Diagnosis. This species is distinguished by the following set of characters: 9 dorsal-fin soft rays; fourth fin spine longest; 17 pectoral-fin rays; 39-44 longitudinal scales rows; 23 pored lateral-line scales; lateral surface of trunk covered with ctenoid scales; anteroventral surface of body and pectoral-fin base covered with exposed cycloid scales; lateral surface of maxilla with no longitudinal ridge; no spines on lateral surface of lacrimal; posterior margin of anterior lacrimal spine with 1?3 small spines; simple posterior lacrimal spine directed ventroposteriorly; no median interorbital ridge and no coronal spine; with occipital pit and supplement preopercular spine; relatively short fin spines and rays, longest pectoral-fin ray (31.5-33.5% of SL); the space between the upper and lower opercular spines is not covered by skin with sensory pores and canals; length of supraocular tentacle is less than or approximately equal to pupil diameter; no te

Classification

Classified By
Motomura, Last & Yearsley, 2005
Class
Ray-finned fishes (Actinopterygii)
Order
Scorpionfishes and Flatheads (Scorpaeniformes)
Family
Scorpionfishes or rockfishes (Scorpaenidae)

Distribution

Region
Southwest Pacific
Distribution
Southwest Pacific: off Norfolk Island and off Lord Howe Island, in the northern Tasman Sea.
Range
Unknown

Environment

Climate
Subtropical
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
86 m
Depth To - meters
113 m
Zone
demersal
Environment
Marine; demersal; depth range 86 - 113 m (Ref. 75652)
Trophic Level
3.45 s.e. 0.55 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
8.8 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
Unknown
Vulnerability
Low to moderate vulnerability (32 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