Miten tunnistaa Balon's Ruffe

Tunnistaaksesi lajin Balon's Ruffe (Gymnocephalus baloni), tarkista nämä keskeiset piirteet.

Fyysiset ominaisuudet

Ruumiinmuoto

elongated

Väritys

Dorsal side is typically olive-brown to grayish-brown, fading to yellowish-white on the ventral side. Flanks often have irregular dark spots or blotches. Fins are usually translucent with faint dark speckles.

Suomutyyppi

ctenoid

Suun asento

terminal

Erottuvat piirteet

Continuous dorsal fin with 11-14 strong, sharp spines in the anterior part and 11-13 soft rays in the posterior part., Large, prominent eyes., Two distinct rows of sensory pores on the head., Absence of scales on the operculum (gill cover).

Selkäevä

Single, continuous dorsal fin with a spiny anterior portion and a soft-rayed posterior portion. The spiny part is significantly higher than the soft-rayed part.

Pyrstöevä

Slightly emarginate to truncate caudal fin.

Rintaevä

Well-developed pectoral fins, typically rounded.

Erottuvat evät

Pelvic fins are thoracic, located directly below the pectoral fins.

Tunnistusvinkit

1. 1

   Dorsal Fin

   Observe the single, continuous dorsal fin. The spiny anterior part is noticeably higher than the soft-rayed posterior part, a key differentiator from other ruffe species.

2. 2

   Head Pores

   Look for two distinct rows of sensory pores on the head, which are more pronounced than in Gymnocephalus cernua.

3. 3

   Operculum

   Note the absence of scales on the operculum (gill cover), a characteristic feature of this species.

4. 4

   Body Shape and Coloration

   Its elongated body and olive-brown to grayish-brown coloration with irregular dark spots are also good indicators.

Tutustu lajiin Balon's Ruffe