Ako identifikovať Lacha

Ak chcete identifikovať Lacha (Brevoortia aurea), všímajte si tieto kľúčové znaky.

Fyzické charakteristiky

Tvar tela

compressed

Sfarbenie

Silvery flanks, darker bluish-green dorsum. Often has a dark spot behind the operculum, followed by several rows of smaller spots along the sides.

Typ šupín

cycloid

Poloha úst

terminal

Charakteristické znaky

Deep, compressed body, Large head with a prominent snout, Large, deeply forked caudal fin, Pectoral fins relatively small, Single dorsal fin located mid-body, Prominent dark spot behind the operculum, often followed by smaller spots

Chrbtová plutva

Single dorsal fin, typically with 17-20 soft rays. Originates slightly anterior to the pelvic fin insertion.

Chvostová plutva

Deeply forked caudal fin, with two equally sized lobes.

Prsná plutva

Small, located low on the body, with 15-17 rays.

Charakteristické plutvy

Pelvic fins are small, located abdominally, with 7 rays. Anal fin is relatively long, with 20-26 soft rays.

Tipy na identifikáciu

1. 1

   Body Shape

   Look for a very deep, laterally compressed body, characteristic of menhaden.

2. 2

   Coloration

   Silvery sides with a darker back, and a distinct dark spot behind the gill cover, often followed by smaller spots in rows.

3. 3

   Head Size

   Relatively large head compared to body size, with a blunt snout.

4. 4

   Fins

   Deeply forked caudal fin and a single dorsal fin positioned centrally on the back.

5. 5

   Mouth

   Terminal mouth, adapted for filter feeding, often appearing wide when open.

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