Slender Carp Gudgeon, Hypseleotris ejuncida Hoese & Allen 1982


Other Names: Slender Gudgeon

Slender Carp Gudgeon, Hypseleotris ejuncida. Source: Gerald R. Allen. License: All rights reserved

Summary:
A small slender tan-coloured gudgeon with 3-4 dark brown bars between the pectoral-fin base and the second dorsal-fin origin, dark brown edged scales forming a diamond-shaped pattern, a broad dark 'stripe' just below midsides, a prominent dark brown spot at end of the caudal peduncle and a large dark brown bar on pectoral-fin base.

Cite this page as:
Martin F. Gomon, Hypseleotris ejuncida in Fishes of Australia, accessed 29 Jan 2020, http://136.154.202.208/home/species/1165

Slender Carp Gudgeon, Hypseleotris ejuncida Hoese & Allen 1982

More Info


Distribution

Known only from the Prince Regent River in Western Australia. Inhabits clear, quiet freshwater pools over sandstone bottoms at about 2 m, usually in or around crevices near the edge.

Features

Meristic features: Dorsal fin VI; I, 9-10; Anal fin I, 9-11; Caudal fin (segmented rays) 15, (branched rays) 11-13; Pectoral fin 8-13; Plevic fin I, 5; Transverse scales usually 8-9; Gill rakers 2-3 + 1+8-9 = 11-13; Vertebrae 25.
Head and body distinctly compressed, depth 5.6-6.3 in SL; caudal peduncle long, greater than second dorsal fin base. Forehead without hump in either sex. Snout short, about equal to eve diameter. Mouth small, very oblique, reaching just in front of posterior nostril; teeth small in several rows in both jaws. Tongue tip truncate. Gill opening reaching forward to below posterior preopercular margin.  Head pores absent. Cheek sensory papillae normally in longitudinal rows, with few vertical rows
Body scales mostly ctenoid, cycloid in patch under first dorsal fin and on head; lateral line absent; longitudinal series 28-31; scales cycloid on belly and nape. Top of head scaled forward to just behind eyes, midline of nape often scaled at least partially, 2-20 on midline, 14-20 at side of midline; operculum with large cycloid scales; cheek naked.
Two dorsal fins; first dorsal low, less than body depth, fourth and fifth spines longest; second dorsal slightly higher than first; posterior rays prolonged in males, longer than third ray; short in females, about two-thirds length of third ray. Caudal fin with rounded to almost truncate margin, more rounded in males. Pelvic fins separate, long and with pointed tip reaching almost to anus.

Size

To around 6cm SL; males larger than females.

Colour

Body tan with 3-4 vertical dark brown bars between pectoral base and second dorsal fin origin; scales edged with dark brown, forming diamond-shaped pattern on body; longitudinal irregular dark brown stripe just below midside, formed from intense dark edges to scales; stripe often obscure in large dark males; prominent dark brown spot at end of caudal peduncle, extending ventrally from midside; dark brown bar at base of pectoral fin darker dorsally, covering whole pectoral base. Females generally paler with the anterior body bands more distinct than in males. Head dark brown in males, paler in females, darker body. Dorsal and anal fins dusky to black; first dorsal with pale whitish median longitudinal stripe; base of second dorsal with 1-2 rows of white spots, prominent in males, sometimes obscure in females; membranes between rays dark forming almost vertical thin stripes, crossing fin rays; second dorsal and anal fins with a pale whitish margin. Caudal fin with 4-6 thin dark brown wavy vertical lines, more prominent in females. Pectoral and pelvic fins clear to dusky.

Feeding

Feed mainly on aquatic invertebrates.

Biology

Oviparous benthic spawners. Eggs are demersal and adhesive.

Remarks

Description appeared in Hoese, D.F. & Allen, G.R. (1983). A review of the gudgeon genus Hypseleotris (Pisces : Eleotridae) of Western Australia, with descriptions of three new species. Rec. West. Aust. Mus. 10(3): 243–261 figs 1–6 after initial publication of description in Allen et al (2002).

Similar Species

Differs from the closely related Hypseleotris kimberleyensis in having the predorsal and operculum usually extensively scaled, white spots and wavy bands on the second dorsal fin, dark spots forming 4-6 wavy bands on the caudal fin, and a dark bar covering the entire pectoral fin base.

Etymology

The species name is from the Latin ejuncida meaning 'slender', in reference to the slender body shape.

Species Citation

Hypseleotris ejuncida Hoese, D.F. & Allen, G.R. in Allen, G.R. (1982). Inland Fishes of Western Australia.  Perth : Western Australian Museum 86 pp. 6 figs 20 pls [56, fig. 6]

Gundarara Creek, Prince Regent River, west Kimberley, WA.

Author

Martin F. Gomon

Slender Carp Gudgeon, Hypseleotris ejuncida Hoese & Allen 1982

References


Allen, G.R., Midgley, S.H. & Allen, M. (2002). Field Guide to the Freshwater Fishes of Australia.  Perth : Western Australian Museum 394 pp.

Hoese, D.F. & Allen, G.R. (1983). A review of the gudgeon genus Hypseleotris (Pisces : Eleotridae) of Western Australia, with descriptions of three new species. Rec. West. Aust. Mus. 10(3): 243–261

Quick Facts


CAAB Code:37429024

Habitat:Quiet freshwater pools

Max Size:6 cm SL

Native:Endemic

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