Overview

Comprehensive Description

Biology

Littoral, near rocks and seagrass (Ref. 5292). Protogynous hermaphrodite, with distinct sexual dichromatism (Ref. 5292).
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Distribution

Range Description

This species is present in the tropical east-central Atlantic only around Ascension Island.
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Eastern Atlantic: Ascension Island and St. Helena. Reported from São Tomé Island (Ref. 34088).
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Eastern Atlantic.
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Physical Description

Size

Maximum size: 100 mm SL
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Max. size

10.0 cm SL (male/unsexed; (Ref. 5292))
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This species is generally reef associated, inhabiting shallow insular waters around rocky shores and rocky reefs to depths of 30 m, and also in seagrass beds (Gomon and Forsyth 1990).

Like its eastern Atlantic congeners, it probably feeds on small benthic invertebrates. It is a protogynous hermaphrodite, and shows distinct sexual dichromatism (Gomon and Forsyth 1990). Its eggs and larvae are planktonic.

Systems
  • Marine
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Environment

reef-associated; marine; depth range 1 - 30 m (Ref. 5292)
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Depth: 1 - 30m.
From 1 to 30 meters.

Habitat: demersal.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Thalassoma ascensionis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 9
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2010

Assessor/s
Pollard, D.

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

Contributor/s

Justification
This species is only known from Ascension Island and is abundant. However, more research is needed to determine any major threats for this species, given its very restricted range. It is listed as Data Deficient.

History
  • 1996
    Vulnerable
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Population

Population
There is no population information available for this species. This species is reported to be very abundant (J.H. Choat pers. comm. 2008).

Population Trend
Unknown
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Threats

Major Threats
There are no major threats known to this species.
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Data deficient (DD) , IUCN Grouper and Wrasse Specialist Group
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Management

Conservation Actions

Conservation Actions
There are no specific conservation measures in place for this species.
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Wikipedia

Thalassoma ascensionis

The Ascension wrasse, Thalassoma ascensionis, is a species of wrasse native to the eastern Atlantic Ocean, where it is known from St. Helena, Ascension Island, and São Tomé. It inhabits areas of seagrass with rocks at depths from 1 to 30 m (3.3 to 98 ft). It can reach 10 cm (3.9 in) in standard length.[2] It is one of several fishes commonly called greenfish.

References[edit]

  1. ^ Pollard, D. 2010. Thalassoma ascensionis. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.1. <www.iucnredlist.org>. Downloaded on 17 November 2013.
  2. ^ Froese, Rainer and Pauly, Daniel, eds. (2013). "Thalassoma ascensionis" in FishBase. October 2013 version.
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