Nictitating eyelids present Anal Fin Present Yes No Body flat and ray like Yes Angel Sharks Squatiniformes No Dogfish Sharks Squaliformes Cow Sharks Hexanchiformes Yes One dorsal fin, six pairs of gill slits No Bullhead Sharks Heterodontiformes Yes Dorsal fins with spines No Yes Carpet Sharks Orectilobiformes Mouth in front of eyes No Yes Ground Sharks Carcharhiniformes Nictitating eyelids present No Mackerel Sharks Lamniformes

Mouth huge, nearly terminal; Caudal fin with strong ventral lobe Yes Whale Sharks Rhincodontidae No Yes Dorsal fins with spines Zebra Sharks Stegostomatidae No Yes Wobbegongs Orectilobidae Mouth in front of eyes No Yes Bamboo Sharks Hemiscylliidae Nictitating eyelids present No Nurse Sharks Ginglymostomatidae

Nictitating eyelids present Yes Dorsal fins with spines Sandtiger Shark Odontaspididae No Yes Basking Shark Orectilobidae Mouth in front of eyes No Yes Mackeral Sharks Lamnidae Nictitating eyelids present No Nurse Sharks Ginglymostomatidae