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Diagnostic Description

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A member of the Puntius conchonius species group which can be distinguished from all its congeners in that group by a combination of the following characters: maxillary barbels present, minute; lateral line abbreviated, on 5-8 scales; circumpeduncular scales 12; dorsal, anal and pelvic fins in adult males hyaline, margined with black and crossed by two or three rows of contrasting deep black spots; humeral spot vertically elongate, three or more scales deep; caudal peduncle blotch covering parts of one or two scales, and indistinct in adult males. Similar only to P. didi, sharing abbreviated lateral line, presence of maxillary barbels, 12 circumpeduncular scales, and colour pattern including both vertically extended humeral blotch and caudal peduncle blotch, other vertical bars absent. Can be separated from P.didi in extension of humeral blotch which reaches ventrally to lateral line scales, vs. extending down to level of pectoral fin base in P. didi; in colour pattern of adult males in which sides yellowish white with contrasting brown blotches at scale bases and abdomen dark pigmented, vs. sides lightly pigmented, gradually lighter ventrally, abdomen whitish in males of P. didi; pelvic fins in males hyaline with two rows of deep black spots and deep black marginal band vs. pelvic fins either without dark markings or blackish marginal stripe and single row of black spots across middle of fin in P. didi; anal fin in males hyaline with deep black margin and two or three rows of deep black spots, vs. blackish margin and at most one row of blackish spots in P. didi; males with conspicuous red colour along middle of side from opercle to base of caudal fin vs. red colour absent from sides in males of P. didi (Ref. 79001).
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Morphology

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Dorsal soft rays (total): 11 - 12; Analsoft rays: 8
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Biology

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Found in an artificial pond (Ref. 79001).
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Odessa barb

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The Odessa barb (Pethia padamya) is a species of cyprinid fish known from Central Myanmar, where it is known to occur in an artificial pond above the Anisakan Falls and also from the lower Chindwin River.[2] For many years it has been known to the aquarium hobby, where it has frequently been confused with the less colourful ticto barb), but it was only described scientifically in 2008.[3][4]

Description

Female Odessa barb

The Odessa barb is a small fish with a laterally compressed body. Among 28 adult specimens (12 males, 16 females) measured in its species description, both sexes were up to about 4.6 centimetres (1.8 in) SL.[5] Hobby aquarist profiles have noted a length of 7 centimetres (2.8 in) SL. This species exhibits sexual dimorphism, which allows for easy identification of the sexes.

Male Odessa barb
Another male Odessa barb

The male has a beige to light brown background color, but is noted for the bright red stripe running the length of the body. The male also has red irises with a narrow black streak through the middle of the eye. The dorsal, anal, and pelvic fins of the male are yellowish green in color, with contrasting black spots. When in spawning condition, the body coloration can intensify with the background becoming darker and the red intensifying on the lateral stripe.

The female is plainly colored, with a light beige body and a reflecting silvery sheen on the scales. The fins of the female are a light yellowish green; however, only the dorsal fin contains the contrasting black spots, which are fainter than those of the male. Both sexes have a black and prominent spot in the dorsal area, as well as a smaller spot in the caudal area.

Etymology

This fish is known by the ornamental fish species name "Odessa barb" because it was said to have first appeared in pet enthusiast's circles in Odesa, Ukraine in the early 1970s.

The genus name "Pethia" refers to a group of small sized barbs present predominantly in South and Southeast Asia. The species name "padamya" is Burmese for ruby, and was chosen in reference to the alternate ornamental fish name "ruby barb" and the vivid color marking of the male.[6]

In the aquarium

Colony of Odessa barb in a home aquarium

Like most barbs, the Odessa barb is an active and generally peaceful fish that is best kept in a community tank. It is a schooling fish that can become semi-aggressive towards other tank mates if it is not kept in groups of 5 or more individuals. As this fish is fast moving, it is best kept in a tank with open spaces, but ample hiding spaces with driftwood or plants is recommended as the fish tend to be skittish if the tank is too bare. A tightly fitted aquarium lid is recommended as well as the fish are prodigious jumpers.

The Odessa barb is a voracious eater that will take most foods given, including flakes and frozen foods, such as Bloodworms. The Odessa barb can be kept with other peaceful fish species including various Tetras, various Corydoras catfish, danios, and the Ram cichlid. A selectively bred strain has been created in North America by Select Aquatics where males have a more vivid red body stripe with darker body coloration.

Breeding

The Odessa barb is an egg scatterer that will lay eggs typically on clumps of plant matter such as moss or other aquatic plants. The parents exhibit no parental care and will eat any laid eggs they find. The young typically hatch in 24 hours and would initially require microscopic food items.

Depending on the temperature, food provided, and water quality, the fry will mature within 5–8 months.

See also

References

Notes
  1. ^ Singh, L. 2010. Pethia padamya. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 3 May 2013.
  2. ^ Froese, Rainer; Pauly, Daniel (eds.) (2013). "Pethia padamya" in FishBase. April 2013 version.
  3. ^ Seriouslyfish: Pethia padamya. Retrieved 26 June 2014.
  4. ^ Kullander, S. O.; and R. Britz (2008). Puntius padamya, a new species of Cyprinid fish from Myanmar (Teleostei: Cyprinidae). Electronic Journal of Ichthyology, Bulletin of the European Ichthyology Society 2: 56-66.
  5. ^ Kullander and Britz 2008, p. 59.
  6. ^ Kullander and Britz 2008, p. 61.
Bibliography

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Odessa barb: Brief Summary

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The Odessa barb (Pethia padamya) is a species of cyprinid fish known from Central Myanmar, where it is known to occur in an artificial pond above the Anisakan Falls and also from the lower Chindwin River. For many years it has been known to the aquarium hobby, where it has frequently been confused with the less colourful ticto barb), but it was only described scientifically in 2008.

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