15-602: Hypseleotris is a genus of fishes in the family Eleotridae . Most are from fresh water in Australia and New Guinea , but species in fresh and brackish water are found around islands in the western Indian Ocean , southern and eastern Africa, southern and eastern Asia, and Pacific islands. The largest species reaches a length of 12 cm (4.7 in). They are sometimes seen in the aquarium trade; especially H. compressa . In Australia they are known as carp gudgeons . The assemblage of species of this genus which occurs in
30-504: Is omnivorous , primarily taking small crustaceans and insects but will also consume algae and aquatic plants. Spawning usually occurs in fresh water during warm weather; the breeding season generally spans from spring to autumn. After spawning with the male, the female fish lays rows of about 3,000 adhesive-coated eggs, each of which are about .32 mm long. The eggs stick to various surfaces, such as plants, logs, rocks, or sand. The male then fertilizes them with "sperm lines". The male guards
45-470: Is a "dusky" colour, and the pectoral and pelvic fins have no colour. During the breeding season, the male's colors brighten significantly, turning a red-orange colour, and they sometimes appear to glow. The male fish uses his colors to attract a mate. The species can quickly change color as needed. The H. compressa population is mostly concentrated in the northern and eastern portions of Australia and south-central New Guinea . It has also been found in
60-473: The Torres Strait , around Muralag and Horn Island . The fish is most commonly found in freshwater flowing rivers or streams, but is also found in still water and can withstand sea water level salinity. It is usually found in the lower reaches of rivers, but can also live upstream. It swims amongst aquatic plants and branches, and sometimes hides among rocks, using them as "caves". The fish
75-569: The 5th Edition of Fishes of the World. Empire gudgeon Eleotris compressus Krefft, 1864 Hypseleotris compressa , the empire gudgeon , is a species of Gobiiform fish in the family Eleotridae endemic to Australia and south-central New Guinea . Gerard Krefft described the empire gudgeon in 1864 as Eleotris compressus , having been discovered by one James F. Wilcox. H. compressa has an elongated body which can be up to 12 cm (4.7 in) long. The males are larger than
90-467: The basin of the Murray-Darling river system is made up of sexually reproducing species and hybrid lineages which consist of a single sex and which have arisen through hybridisation , a process known as hybridogenesis . The single sex species require gametes from the sexual species to reproduce and could be regarded as sexual parasites and in "closed populations" this sexual parasitism can cause
105-468: The deep divergence between the three, some authorities have recommended splitting them into separate families: Butidae , Eleotridae and Milyeringidae . The 5th edition of Fishes of the World follows this classification and this means that the following genera are currently included within the Eleotridae. However, the family Xenisthmidae is regarded as a synonym of the Eleotridae, according to
120-490: The eggs until the young fish hatch, which usually takes 10–14 hours. After hatching, the young fish go downstream to estuaries , where their development takes place. Once grown, the fish return to fresh water. This spawning strategy, coupled with the very small size of the newborn fry, has hindered efforts at propagating this species for aquariums, though it has been accomplished by accident in shrimp aquaculture ponds. A controlled study comparing six native fish species with
135-403: The extinction of such populations. It is likely that this reproduction involves androgenesis . The 19 recognized species in this genus are: This Eleotridae -related article is a stub . You can help Misplaced Pages by expanding it . Eleotridae Eleotridae is a family of fish commonly known as sleeper gobies , with about 34 genera and 180 species . Most species are found in
150-408: The females. The fish does not have a lateral line , but does have ctenoid scales. Its color varies, but the fish generally has a yellowish-tan to golden-brown head, although it can occasionally be a dark brown. Its abdomen is usually a whitish-red color. During the off-breeding seasons, males can be identified by prominent, variously colored bands on their anal and dorsal fins. The caudal fin
165-545: The freshwater stream ecosystems on oceanic islands such as New Zealand and Hawaii that otherwise lack the predatory fish families typical of nearby continents, such as catfish . Anatomically , they are similar to the gobies ( Gobiidae ), though unlike the majority of gobies, they do not have a pelvic sucker. Like the true gobies , they are generally small fish that live on the substrate , often amongst vegetation , in burrows, or in crevices within rocks and coral reefs . Although goby-like in many ways, sleeper gobies lack
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#1732781063384180-605: The gudgeon and after which the Australian sleeper gobies were likely named). A few of these, such as the empire gudgeon ( H. compressa ) and peacock gudgeon ( Tateurndina ocellicauda ), are sometimes kept in aquariums. The smallest in the family are the Amazonian Leptophilypnion with a standard length of less than 1 cm (0.4 in). The family has been divided into three subfamilies: Butinae, Eleotrinae and Milyeringinae. However, because of
195-567: The largest members of the family are predatory species such as the bigmouth sleeper ( Gobiomorus dormitor ) at up to 90 cm (3.0 ft) from freshwater near the West Atlantic region. However, most are much smaller, such as the fresh- and brackish-water species from Australia and New Guinea , including Hypseleotris , known locally as gudgeons (not to be confused with the Eurasian freshwater cyprinid Gobio gobio , also known as
210-478: The pelvic fin sucker and that, together with other morphological differences , is used to distinguish the two families. The Gobiidae and Eleotridae likely share a common ancestor and they are both placed in the order Gobiiformes , along with a few other small families containing goby-like fishes. Dormitator and Eleotris , two of the most widespread and typical genera, include a variety of species that inhabit marine , estuarine and freshwater habitats. Among
225-626: The tropical Indo-Pacific region, but there are also species in subtropical and temperate regions, warmer parts of the Americas and near the Atlantic coast in Africa. While many eleotrids pass through a planktonic stage in the sea and some spend their entire lives in the sea; as adults, the majority live in freshwater streams and brackish water. One of its genera, Caecieleotris , is troglobitic . They are especially important as predators in
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