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Thailands Zoos and Animals The forum to tell us about your visits to the tiger temples in Kanchanaburi or the tiger zoo in Sri Racha, crocodile farms in Pattaya & Bangkok, Thai elephant kraals in Ayutthaya & Phuket, Panda bears in Chiang Mai zoo. Thailand has many zoo's and wildlife sanctuaries and quite often you can get the oppurtunity to eat crocodile eggs, or emu steaks and many other exoctic dishes, or just check out our Thai Snakes, Thai Ducks, Thai Bats, Mongoose, Hornbills, Crocodiles or Thai Freshwater Fish sections.

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Old 01-05-2009, 05:01 PM   #1 (permalink)
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Harlequin Rasbora

Harlequin Rasbora

Description

The Harlequin Rasbora is a fish that has an approximately lozenge-shaped body, whose basal colour from the head to the caudal peduncle is an orange-pink, the exact hue varying depending upon such factors as water conditions and the original population from which the fish was obtained. The posterior half of the body is overlaid with a large, roughly triangular black marking, that tapers toward the terminal end of the caudal peduncle, and begins approximately below the midpoint of the attachment of the dorsal fin (commonly called a "black wedge"). In common with all Cyprinids, the articulation of the pectoral and pelvic fins follows a familiar pattern, the pectoral fins being located immediately posterior to the operculum or gill cover, whilst the pelvic fins are located some way further back along the ventral portion of the body, in this case almost directly in a vertical line drawn through the dorsal fin. This relationship between the pectoral and pelvic fins is seen in Characins as well as Cyprinids, and is a feature of all the Ostariophysans (fishes possessing an auxiliary mechanism for detecting sound consisting of a set of internal bones called the Weberian Ossicles).

The dorsal, anal, caudal and pelvic fins are all tinted red, the caudal fin being forked, with the red colour concentrated in the outermost rays, the inner section of the tail fin being more hyaline.
Lamb chop rasboras T. espei

It is possible to confuse this fish with two similar species that were indeed originally considered to be subspecies of T. heteromorpha, namely Trigonostigma espei and Trigonostigma hengeli. These fishes are more slender in body shape than T. heteromorpha, and the black marking, instead of being approximately triangular, has a horizontal stripe which tapers towards the caudal peduncle, and is greatly thickened and extended downwards below the dorsal fin. Due to this fishes with this marking are commonly known as "Lamb Chop Rasboras" due to its perceived resemblance to the butchery cut known as a Lamb Chop.

A fully mature individual Harlequin Rasbora attains a standard length of 2 inches (5 cm).

Males are cited as possessing a slightly larger black body patch than females, with the section adjoining the anal fin being more rounded in males. Ripe females are noticeably fuller in body outline.
More here.




Last edited by dirtydog : 01-05-2009 at 05:48 PM.
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