|
Ground Sharks
Carcharhiniformes ( from Classical Greek ' (karcharos) 'sharp/jagged' and ' (rhinos) 'nose', plus Latin ''forme'' 'shape'), commonly known as ground sharks, are the largest order of sharks, with over 270 species. They include a number of common types, such as Scyliorhinidae, catsharks, swellsharks, and Requiem shark, requiem sharks. Members of this order are characterized by the presence of a nictitating membrane over the eye, two dorsal fins, an anal fin, and five gill slits. The families in the order Carcharhiniformes are expected to be revised; recent DNA studies show that some of the conventional groups are not monophyletic. The oldest members of the order appeared during the Middle-Late Jurassic, which have teeth and body forms that are morphologically similar to living Scyliorhinidae, catsharks. Carchariniformes first underwent major diversification during the Late Cretaceous, initially as mostly small-sized forms, before radiating into medium and large body sizes during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Finetooth Shark
The finetooth shark (''Carcharhinus isodon'') is a species of requiem shark, in the family (biology), family Carcharhinidae, found in the western Atlantic Ocean, from North Carolina to Brazil. It forms large Shoaling and schooling, schools in shallow, coastal waters, and fish migration, migrates seasonally following warm water. A relatively small, slender-bodied shark, the finetooth shark can be identified by its needle-like teeth, dark blue-gray Anatomical terms of location#Dorsal and ventral, dorsal coloration, and long gill slits. It attains a maximum length of 1.9 m (6.2 ft). The diet of this species consists primarily of small bony fishes, in particular menhaden. Like other members of its family, it is viviparous with females giving birth to two to six pups in estuary, estuarine nursery areas every other year. Valued for its meat, the finetooth shark forms an important component of the commercial fishing, commercial gillnet shark fishery operating off the southeast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
