Requiem sharks, ground sharks, blue sharks, and sharpnose sharks are the common names for the members of the Carcharhinidae family. They have 5 gill openings, the fifth behind origin of pectoral fin. Their eyes are on sides of head, with a well-developed nictitating lower eyelid. They also have sharp blade like teeth.
Members of the Carcharhinidae are found in all oceans, mostly in tropical waters. There are the largest shark family, with 12 known genera and 58 species worldwide. Small species often occur inshore while the large species often occur offshore. These fishes are strong and active swimmers. They can occur either solitary or in small school. All species are live-bearing, with young born fully developed. They feed on any animal that may present in their habitat, and some large species are known to attack human.
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Scientific Name: Carcharhinus macloti (Müller & Henle, 1839) English Name: Hardnose Shark Mandarin Name:: 鲨鱼 (Shāyú) Local Malay Name: Yu Pasir, Yu Jereh, Yu Muncung Keras Local Hokkien: Sua Hu Size: Maximum total length 110 cm. Size at birth 45 to 50 cm. Main Diagnostic Features: Snout very long and narrowly rounded or pointed. Posterior margin of pectoral fins and ventral caudal-fin lobe with an inconspicuous white edge.  Scientific Name: Carcharhinus sorrah (Müller & Henle, 1839) English Name: Spot-tail Shark, Sorrah Shark, School Shark Mandarin Name:: 鲨鱼 (Shāyú) Local Malay Name: Kalitan, Yu Kepak Hitam Local Hokkien: Sip Suar Size: Maximum total length to about 1.6 m, adults commonly 1.06 to 1.5 cm. Size at birth about 50 to 60 cm. Main Diagnostic Features: Pectoral fins, second dorsal fin, and lower caudal-fin lobe with conspicuous black tips.    Scientific Name: Scoliodon laticaudus Müller & Henle, 1838 English Name: Spadenose Shark, Yellow Dogshark, Indian Dogshark Mandarin Name:: 尖头沙 (Jiāntóushā) Local Malay Name: Yu Jerih, Jerung, Yu Padi Local Hokkien: Sua Hu Size: Maximum total length about 74 cm. Size at birth about 13 to 15 cm. Main Diagnostic Features: Long snout.    
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