| Hemibrycon sanjuanensis | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Characiformes |
| Family: | Characidae |
| Genus: | Hemibrycon |
| Species: | H. sanjuanensis |
| Binomial name | |
| Hemibrycon sanjuanensis | |
 | |
| Range of H. sanjuanensis | |
Hemibrycon sanjuanensis is a species of characin from the upper San Juan River, Colombia. [1]
It takes its name from the San Juan River, where specimens were collected. [1]
Individuals range between 21.3–84.9 millimetres (0.84–3.34 in) in length. The body is slender and long, with a short, compressed face and flexible lips. In an example of sexual dimorphism, the rays of males' pelvic and anal fins are lined with small hooks. [1]
General coloration is a dark brownish-yellow, with a dark stripe running from directly behind the gills to the caudal peduncle. The ventral surface is light yellow. The dorsum and fins are patterned with melanophores. A reddish spot can be observed on the ventral part of the base of the caudal fin. [1]
H. sanjuanensis is believed to be endemic to the upper San Juan River in Colombia. Specimens were recovered from clear, fast-flowing streams with sandy or rocky bottoms. [1]
The species is insectivorous. Among other things, it has been known to eat water scavenger beetles, black flies, flesh flies, damselflies, predaceous diving beetles, caddisflies, nematodes, and isopods. [1]
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Synodontis greshoffi is a species of upside-down catfish native to the Congo Basin of Cameroon, the Democratic Republic of the Congo and the Republic of the Congo. It was first collected by M.A. Greshoff in Pool Malebo on the upper Congo River, and the species was named for him by the author of the first paper written about the species, Belgian ichthyologist Louise Schilthuis, in 1891.
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Hemibrycon is a genus of characins. They are mainly found in South America, Trinidad in the Caribbean), and H. dariensis of east Panama.
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