Scoliodon
Spatennasenhai ( Scoliodon laticaudus ) from the first description of Müller & Henle, 1838
The spade nose shark ( Scoliodon ) are a genus of requiem sharks ( Carcharhinidae ) containing two species. The Spatennasenhai ( Scoliodon laticaudus ) is common in many parts of the Indian Ocean and the Red Sea, while Scoliodon macrorhynchos lives in the western Pacific.
Appearance and characteristics
The spade nose shark sharks are sleek with body lengths of about 50 to 70 centimeters. They resemble in habit the sharks of the genus Carcharhinus, but has a long, extremely flattened snout. They have an anal fin and two dorsal fins, the second dorsal fin is much smaller than the first and anal fins. The first dorsal fin is triangularly shaped and clearly quoting behind the pectoral fins. The rear end of the first dorsal fin is above the pelvic fins. The anal fin substantially greater than the second dorsal fin. A spray hole is not present and the eyes are relatively small with Nick hides.
The head of Scoliodon macrorhynchos is compared with Scoliodon laticaudus shorter, the anal fin slightly longer and the Klaspern the males slightly shorter.
Way of life
Spade nose sharks are predatory and feed on Flachwasserart of different fish, especially soil types. The sharks are viviparous and form a yolk sac placenta ( placental viviparous ).
Dissemination
Scoliodon laticaudus is common in many parts of the Indian Ocean from Tanzania to India and Sri Lanka. It is a shallow-water inhabitants of the continental shelf, the preferred stony grounds. When the spade nose shark in the western Pacific from Japan to Indonesia and the Philippines are Scoliodon macrorhynchos, where the Bay of Bengal by a third, undescribed species or Scoliodon muelleri, which was synonymized with Scoliodon laticaudus.