dcsimg

Migration

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Catadromous. Migrating from freshwater to the sea to spawn, e.g., European eels. Subdivision of diadromous. Migrations should be cyclical and predictable and cover more than 100 km.
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Biology

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Inhabits shallow waters, generally at depth of less than 50 m. Juveniles gather in sheltered inshore waters, such as estuarine areas, shallow mudflats and sandflats, where they remain for up to two years (Ref. 9072). This species is poorly studied, fast growing and short lived (to at least 4 years) (Ref. 47621).
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Importance

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fisheries: commercial; gamefish: yes
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Black flounder

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The black flounder (Rhombosolea retiaria), also known by the Māori language name mohoao,[2] is a flatfish of the genus Rhombosolea, found around New Zealand in shallow enclosed waters and coastal freshwater lakes. Its adult length ranges from 20 to 45 cm.

Description

Rhombosolea retiaria is known for its black back and orange spots.[2]

Habitat

Rhombosolea retiaria is the only species of flounder in New Zealand that can thrive in freshwater. It can be found in streams as far as 100 kilometres (62 mi) inland from the ocean.[2]

References

  1. ^ David, B.; Franklin, P.; Hitchmough, R.; Closs, G.; Allibone, R.; Ling, N.; West, D.; Crow, S. (2014). "Rhombosolea retiaria". IUCN Red List of Threatened Species. 2014: e.T197304A2481933. doi:10.2305/IUCN.UK.2014-3.RLTS.T197304A2481933.en. Retrieved 18 November 2021.
  2. ^ a b c Vennell, Robert (5 October 2022). Secrets of the Sea: The Story of New Zealand's Native Sea Creatures. HarperCollins Publishers Ltd. pp. 84–89. ISBN 978-1-77554-179-0. Wikidata Q114871191.
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Black flounder: Brief Summary

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The black flounder (Rhombosolea retiaria), also known by the Māori language name mohoao, is a flatfish of the genus Rhombosolea, found around New Zealand in shallow enclosed waters and coastal freshwater lakes. Its adult length ranges from 20 to 45 cm.

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