Overview

Distribution

Range Description

This species is only known from the south Pacific Ocean around Pitcairn Island and Rapa Island, and possibly also the Tuamotu Archipelago.
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Eastern Central Pacific: Pitcairn Group and the Tuamoto Archipelago.
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Physical Description

Morphology

Dorsal spines (total): 8; Dorsal soft rays (total): 13; Analspines: 3; Analsoft rays: 10; Vertebrae: 25
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Size

Max. size

11.6 cm SL (male/unsexed; (Ref. 10372))
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Diagnostic Description

Caudal fin varying from slightly rounded in juveniles to emarginate to deeply emarginate in adults. Outer half of caudal fin dusky to blackish in adults (Ref. 10372). Head greenish with a single blue-green stripe running from mouth under eye, then turning ventrally to end on posterior margin of opercle (Ref 9823).
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Type Information

Paratype for Thalassoma heiseri Randall & Edwards
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): J. Randall, D. Cannoy & D. Bryant
Year Collected: 1971
Locality: Henderson Island; 0.5 Mile South of NW Corner of Island; Rocky Shore., Henderson Island, Pitcairn Islands, Pacific
Depth (m): 1
  • Paratype: Randall, J. E. & Edwards, A. 1984. Journal of Aquariculture and Aquatic Sciences. 4 (2): 15.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
The main habitat of this species is probably rocky reefs, and maybe also coral reefs to depths of 15 m. The diet probably comprises mainly benthic macro-invertebrates, and the eggs and larvae are probably pelagic.

Systems
  • Marine
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Depth range based on 7 specimens in 1 taxon.
Water temperature and chemistry ranges based on 7 samples.

Environmental ranges
  Depth range (m): 2.35 - 9
  Temperature range (°C): 22.368 - 22.496
  Nitrate (umol/L): 0.121 - 0.139
  Salinity (PPS): 35.516 - 35.552
  Oxygen (ml/l): 5.032 - 5.079
  Phosphate (umol/l): 0.145 - 0.165
  Silicate (umol/l): 1.623 - 2.486

Graphical representation

Depth range (m): 2.35 - 9

Temperature range (°C): 22.368 - 22.496

Nitrate (umol/L): 0.121 - 0.139

Salinity (PPS): 35.516 - 35.552

Oxygen (ml/l): 5.032 - 5.079

Phosphate (umol/l): 0.145 - 0.165

Silicate (umol/l): 1.623 - 2.486
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Environment

reef-associated; marine
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2010

Assessor/s
Pollard, D. & Cabanban, A.

Reviewer/s
Craig, M.T. & Carpenter, K.E.

Contributor/s

Justification
This species has a restricted distribution as it is found only at Pitcairn Island and Rapa Islands, and possibly also the Tuamotu Archipelago. Although there is very little known about its population status, biology or ecology, there are no perceived major threats to this species as the islands where it is found are not heavily populated. It is listed as Least Concern.
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Population

Population
Theres is no population information available for this species.

Population Trend
Unknown
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Threats

Threats

Major Threats
There are no known major threats to this species.
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Least Concern (LC)
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Management

Conservation Actions

Conservation Actions
There are no specific conservation measures in place for this species. The islands within this species range are not heavily populated.
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Wikipedia

Thalassoma heiseri

Thalassoma heiseri is a species of fish in the Labridae family.

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