Umbra , or Evdoshka [1] ( lat. Umbra ), is a genus of fresh-water ray-finned fish from the order Pike - like , the only one in the family of Umbra [1] , or Evdoshkovka [1] (Umbridae) [2] .
| Umber |
American Evdushka ( Umbra limi ) |
| Scientific classification |
|---|
| No rank : | Bilateral symmetrical |
| Squadron : | Protacantopterygia |
| Family: | Umber ( Umbridae Bonaparte , 1845 ) |
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| International scientific name |
|---|
Umbra in Scopoli , 1777 |
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Content
The fish are small in size, with a maximum body length of 14-17 cm. The mouth is small. The jaws have small teeth. The dorsal fin with 13-17 soft rays is shifted to the tail of the body. The anal fin with 7-10 soft rays is located under the back of the dorsal. Very wide pectoral fins with 11-16 soft rays are located immediately behind the gill cover. The caudal fin is rounded. In the lateral line 30–36 scales [2] .
When moving forward, the umbrellas alternately move the pectoral and ventral fins, similar to the way a horse acts in a gallop with its feet. The dorsal fin sways in waves. Umbreas usually adhere to silty bottom areas that are heavily overgrown with vegetation. They dig silt with a tail fin and often burrow into it. It was assumed that they can winter, buried in silt, but there is no evidence for this, and, on the contrary, they caught American eunuchs in the winter, in an active state, with leftover food in their stomachs.
They can breathe atmospheric air using a modified swim bladder.
The genus includes 3 species:
- Umbra krameri Walbaum, 1792 - European Eudishka Southeast Europe
- Umbra limi (Kirtland, 1840) - American Evdoshka Central-Eastern North America
- Umbra pygmaea (DeKay, 1842) - Dwarf yevdoshka east of the USA
