Grande vive ,Tracina drago ,Δράκαινα
(Trachinus draco)
The color of weever ( weever , Grande vive , Tracina drago , Trachinus draco ) body is a greenish yellow or lime, to dark green and brown, on the head and back, with pale sides, and with yellowish to bluish-brown oblique lines ,The greater weever's body is elongate, tapered, laterally compressed, weever with a large head, and length up to six times its height. The upper rim of the eye has two to three small open spines, weeverin front of each eye ,The mouth is huge and is set obliquely. The eyes are placed toward the top of the head. The dorsal fin is blackish. The second dorsal fin, and anal fins, have a yellow stripe running their length.
Its pectoral fin is rounded with a notch. fresh fish exporter On the first dorsal fin, both of the spines, and those of the gill covers, have venom glands attached to them. The spines are grooved, and when pressed, toxin is driven up the grooves , The interaction of two muscles (flexor and extensor) attached to the plate opercularis increases the exposed portion of the spine in order to facilitate the injection of venom. These two muscles are antagonistic, the contraction of one erects the spine, fresh fish exporter and thus increases the exposed portion of it such that the membrane surrounding the spine is not elastic, while the contraction of the other reduces the size of the exposed portion. The length of the exposed part of the spine depends on the angle of the opening of the cover.
The outer membrane of the spine fresh fish export presses on the venom gland during the contraction of the flexor muscle, causing the venom to be ejected along the spine , It is found in the Eastern Atlantic, Norway to Morocco, Madeira and the Canary Islands, including the Mediterranean and the Black Sea. It is found in all waters of the United Kingdom. Climate is temperate and geographically it is found within 66° N - 27° N, 19° W - 42° E.
The greater weever, like the lesser weever, is found on muddy, sandy or gravelly bottoms, from a few m to about 150 m. It usually rests on the bottom, fresh fish export with eyes closed often, and the tip of the first dorsal fin exposed. At night, they swim around wanderously, even pelagically, feeding on crustaceans,shrimps and crabs, as well as smaller fish.
Along the scales are dark markings. The anterior dorsal fin and contains various venomous spines
