Miten tunnistaa Dusky Grouper

Tunnistaaksesi lajin Dusky Grouper (Epinephelus marginatus), tarkista nämä keskeiset piirteet.

Fyysiset ominaisuudet

Ruumiinmuoto

torpedo

Väritys

Adults typically exhibit a mottled brown to reddish-brown background coloration, often with irregular pale blotches and spots that can change intensity depending on the environment and stress levels. The ventral side is usually lighter. Juveniles are often more distinctly patterned with dark bands and lighter areas.

Suomutyyppi

ctenoid

Suun asento

terminal

Erottuvat piirteet

Robust, elongated body with a large head and mouth., Thick, fleshy lips., Three to five rows of teeth on the mid-side of the lower jaw., Rounded caudal fin in adults, slightly emarginate in juveniles., Preopercle finely serrated, with a distinct notch above the angle., Operculum with three flat spines, the middle one being the largest.

Selkäevä

Single dorsal fin with XI spines and 13-16 soft rays. The spiny and soft-rayed portions are continuous, with the spiny part being lower than the soft-rayed part.

Pyrstöevä

Rounded in adults, slightly emarginate in juveniles. Dark with a pale margin.

Rintaevä

Large and rounded, typically longer than the pelvic fins. 17-19 rays.

Erottuvat evät

Pelvic fins are relatively short, inserted just behind the pectoral fin base. Anal fin has III spines and 8-9 soft rays.

Tunnistusvinkit

1. 1

   Body Coloration and Pattern

   Look for the mottled brown to reddish-brown body with irregular pale blotches and spots. The intensity of these markings can vary.

2. 2

   Caudal Fin Shape

   Adults have a distinctly rounded caudal fin, often with a pale margin. Juveniles may have a slightly emarginate (indented) caudal fin.

3. 3

   Preopercle

   Examine the preopercle (bone covering the gill arch). It is finely serrated with a noticeable notch above the angle.

4. 4

   Mouth and Lips

   Note the large mouth with thick, fleshy lips and the presence of three to five rows of teeth on the mid-side of the lower jaw.

5. 5

   Size

   Adults can reach impressive sizes, up to 150 cm (59 inches) in total length and over 60 kg (132 lbs) in weight, though typically observed between 50-100 cm.

Tutustu lajiin Dusky Grouper