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Phalloceros caudimaculatus (HENSEL, 1868)

Dusky Millions Fish

May 30th, 2014 — 10:22pm

Occurs naturally in Brazil, Paraguay, Uruguay and Argentina with feral populations in Australia, New Zealand, Ethiopia and Malawi which were purportedly introduced for purposes of mosquito control but are now considered invasive.

Following Lucinda (2008) its natural range comprises the Lagoa dos Patos system, lower rio Uruguai, rio Tramandaí, and rio Mampituba in Rio Grande do Sul st…

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Neosilurus brevidorsalis (GÜNTHER, 1867)

Shortfin Tandan

June 19th, 2013 — 10:30pm

Type locality is ‘Nicol Bay, Cape York, Queensland, Australia’, and this species is restricted to the tips of northern Australia and southern Papua New Guinea.

In Australia records exist only from the Jardine and Jackson river systems on the Cape York Peninsula, while in Papua New Guinea it’s known from the Fly River plus some other drainages.

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Chlamydogobius eremius (ZIETZ, 1896)

Desert Goby

November 16th, 2012 — 4:42pm

Lake Eyre is a vast endorheic basin within which lies the lowest point in Australia at some 15 m BMSL. It only fills with water occasionally and when it does so forms the country’s largest salt lake.

C. eremius does not occur in the lake itself since no fishes are able to survive there, rather it inhabits isolated freshwater springs, flowing artesian bores (wells), and ephemeral waterholes where it tends to be associated with rocks and other submerged cover.

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Butis amboinensis (BLEEKER, 1853)

Olive Flathead Gudgeon

September 26th, 2012 — 2:04pm

This species is not traded for aquaria but is occasionally exported as bycatch among shipments of other species. It differs from congeners in that the outermost row of teeth are not enlarged plus the interorbital space and cheek below eye are not scaled.

Butis spp. are largely nocturnal ambush predators with cryptic…

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Pseudomugil tenellus TAYLOR, 1964

Delicate Blue-eye

September 17th, 2012 — 4:42pm

Euryhaline and mostly inhabits coastal floodplains where it’s found in both fresh and brackish habitats, including tidal estuaries and salt marshes. It’s particularly common in swamps, billabongs, and slow-moving streams where aquatic vegetation grows densely, but some populations have colonised upper sections of freshwater streams. Larger individuals may also move into main river channels.

Tappin (2010) gives the following ranges of parameters based on those taken from various localities: temperature 27 – 38 °C, pH 5…

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Pseudomugil cyanodorsalis ALLEN & SARTI, 1983

Neon Blue-eye

September 17th, 2012 — 11:23am

Euryhaline and thus capable of withstanding significant fluctuations in salinity and other water conditions. It’s been recorded in full marine conditions as well as pure freshwater environments, and commonly inhabits coastal mangrove creeks and swamps.

Such changes may occur on a daily or seasonal basis depending on locality, with some habitats influenced by daily tides whereas others become hypersal…

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Iriatherina werneri MEINKEN, 1974

Threadfin Rainbowfish

March 13th, 2012 — 1:22pm

There also exists a sister-group relationship between the Melanotaeniidae and Malagasy family Bedotiidae, which may seem surprising given their respective modern-day distributional patterns. The precise origin and subsequent dispersal of the two families has been the subject of debate, with some palentologists suggesting that Madagascar’s freshwater fishes derived froma trans-oceanic dispersal during the Cenozoic Era, but the most compelling arguments currently indicate a freshwater radiation which occurred during the Mezozoic break-up of Gondwana.

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Hypseleotris compressa (KREFFT, 1864)

Empire Gudgeon

March 13th, 2012 — 1:22pm

Occurs in northern and eastern Australia and southern New Guinea.

In the former its range extends from the Pilbara and Kimberley regions of Western Australia state around the northern and eastern coastlines of the continent as far as the Towamba river system in New South Wales state.

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Butis butis (HAMILTON, 1822)

Crazy Fish

March 13th, 2012 — 1:21pm

Butis spp. are largely nocturnal ambush predators with cryptic patterning to help them blend in with their surroundings. They can also lighten and darken their body colouration to an extent, have a habit of aligning themselves with solid surfaces whether horizontal, vertical, or inverted, and often swim in an upside-down position.

The genus is usually included in the family Eleotridae of which members are often referred to…

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Pseudomugil signifer KNER, 1866

Pacific Blue-eye

March 13th, 2012 — 1:19pm

Generally found within 15-20 km of the sea but habitat-type is extremely variable. It’s been recorded in full marine conditions as well as pure freshwater environments, and commonly inhabits coastal mangrove creeks, swamps, and salt marshes.

Freshwater habitats tend to comprise lowland swamps or forest streams with clear water but some populations inhabit acidic, tannin-stained, black waters. It’s also abundant in the artificial canals typical of residential zones in the Gold Coast, southern Queensland.

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