Monodactylus argenteus

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Monodactylus argenteus
Monodactylus argenteus, commonly known as the silver moony,Mono angel
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Monodactylidae
Genus: Monodactylus
M. argenteus
Binomial name
Monodactylus argenteus
  • Chaetodon argenteus Linnaeus, 1758
  • Psettus argenteus (Linnaeus, 1758)
  • Scomber rhombeus Forsskål, 1775
  • Psettus rhombeus (Forsskål, 1775)

Monodactylus argenteus is a species of fish in the family Monodactylidae, the moonyfishes. Its common names include silver moonyfish, or silver moony,[2] butter bream, and diamondfish.[3] It is native to the western Pacific and Indian Oceans, including the Persian Gulf, Red Sea, and associated estuaries, such as the Mekong Delta.[2]

This species reaches a maximum length of about 27 centimeters. It is bright shiny silver with yellowish edges to the fins.[2] The dorsal and anal fins have black tips.[3] Juveniles have more yellow coloration[2] and are distinguished by two vertical black bands.[4]

A school of silver moony fish swimming above corals off the coast of Madagascar.

This species occurs in a wide variety of habitat types, including the open ocean, brackish waters, and the freshwater habitat of rivers.[2] In Australia it can be found in harbors and estuaries around piers.[3] Its ability to survive in a wide range of salinities makes it a model organism in the study of salinity tolerance.[4][5] Juveniles are especially tolerant to salinity changes, easily maintaining homeostasis in variable environments such as estuaries.[4]

Although the silver moony displays territorial behavior,[2] the species can be kept in saltwater aquaria and is easy to rear in captivity.[5] It can remain solitary or form schools. It is a detritivore and planktivore.

The myxozoan parasite Kudoa monodactyli was first described from and named after this fish.[6]


  1. ^ Azeroual, A.; Kaymaram, F.; Abdulqader, E.; Alnazry, H.; Al-Husaini, M.; Almukhtar, M.; Hartmann, S.; Alam, S.; Sparks, J.S. (2017). "Monodactylus argenteus". IUCN Red List of Threatened Species. 2017: e.T166925A46644370. doi:10.2305/IUCN.UK.2017-3.RLTS.T166925A46644370.en. Retrieved 20 November 2021.
  2. ^ a b c d e f Froese, R. and D. Pauly, Editors. Monodactylus argenteus. FishBase. 2017.
  3. ^ a b c Monodactylus argenteus. Fishes of Australia.
  4. ^ a b c Kang, C., et al. (2012). Effects of low environmental salinity on the cellular profiles and expression of Na, K-ATPase and Na, K, 2Cl 2 cotransporter 1 of branchial mitochondrion-rich cells in the juvenile marine fish Monodactylus argenteus. Fish Physiol Biochem 38 665-678.
  5. ^ a b Yang, S., et al. (2015) Comparisons of two types of teleostean pseudobranchs, silver moony (Monodactylus argenteus) and tilapia (Oreochromis mossambicus), with salinity‑dependent morphology and ion transporter expression. J Comp Physiol B185 677-693.
  6. ^ Gunter, N. L., et al. (2006). Characterization of Kudoa monodactyli n. sp.(Myxosporea: Multivalvulida) from the muscle of Monodactylus argenteus (Teleostei: Monodactylidae) from Moreton Bay, Queensland, Australia. The Journal of Eukaryotic Microbiology 53(5), 374.

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