Overview

Comprehensive Description

Biology

Inhabits lagoon and seaward reefs (Ref. 9710). Benthic (Ref. 58302). Generally hidden beneath ledges or caves during the day; a nocturnal feeder on crustaceans (Ref. 3921).
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Distribution

Eastern Central Pacific: known only from Hawaii.
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Hawaiian Islands.
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Physical Description

Morphology

Dorsal spines (total): 13; Dorsal soft rays (total): 11 - 12; Analspines: 3; Analsoft rays: 6 - 8
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Size

Maximum size: 220 mm TL
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Max. size

22.0 cm TL (male/unsexed; (Ref. 3921))
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Diagnostic Description

Pectoral rays all unbranched, very long and free from membrane distally; dorsal spines very long, some about as long as body depth. Ctenoid scales with about 50-55 vertical scale rows; coronal spines present; most head spines become multiple with growth. Lachrymal and suborbital bones densely covered with spines for specimen 10 cm SL. Supraocular tentacles banded with black, frequently tentacles absent in large specimens. Small specimens with fewer bars on pectoral and pelvic fins.
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Type Information

Type for Pterois sphex
Catalog Number: USNM 50650
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Illustration
Collector(s): D. Jordan & B. Evermann
Locality: Honolulu, Hawaii, Oahu, Hawaii, United States, Hawaiian Islands, Pacific
  • Type:
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Ecology

Habitat

Environment

reef-associated; non-migratory; marine; depth range 3 - 122 m (Ref. 3921)
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Depth range based on 9 specimens in 1 taxon.
Water temperature and chemistry ranges based on 5 samples.

Environmental ranges
  Depth range (m): 119 - 150
  Temperature range (°C): 21.733 - 21.733
  Nitrate (umol/L): 0.434 - 0.434
  Salinity (PPS): 35.138 - 35.138
  Oxygen (ml/l): 4.731 - 4.731
  Phosphate (umol/l): 0.132 - 0.132
  Silicate (umol/l): 1.866 - 1.866

Graphical representation

Depth range (m): 119 - 150
 
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Depth: 3 - 122m.
From 3 to 122 meters.

Habitat: reef-associated. Inhabits lagoon and seaward reefs (Ref. 9710). Generally hidden beneath ledges or caves during the day; a nocturnal feeder on crustacenas.
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Conservation

Threats

Not Evaluated
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Relevance to Humans and Ecosystems

Benefits

Importance

aquarium: commercial
  • Miyasaka, A. 1993 A database on scientific and common names of fishes exported from Hawaii. The information was derived from the above mentioned database. A printout of the names is also available from the State of Hawaii, Department of Land and Natural Resources, 1151 Punchbowl Street, Honolulu, Hawaii. (Ref. 5358)   http://www.fishbase.org/references/FBRefSummary.php?id=5358&speccode=4306 External link.
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Wikipedia

Pterois sphex

Pterois sphex is a scorpaenid fish of the genus Pterois, which is known commonly as the Hawaiian Turkeyfish.[2] This species is found in the Eastern Central Pacific, specifically in marine waters off of Hawaii. Pterois sphex is found in seaward reefs and lagoons at a depth range of 3 – 122 m.[3]

Description

This fish has thirteen dorsal spines and about 50-55 vertical scale rows (ctenoid scales).[4] It reaches a maxium length of 22 cm.[5]

Behavior and diet

Pterois sphex is a nocturnal feeder, preying on crustaceans. It hides in caves during the day.[6]

References


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