Sharks And Dolphins: A Case Of Amazing Convergent Evolution

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With fossil records dating back 400 million years, sharks have outlived the dinosaurs and many other forms of life currently on earth. There are more than 500 species of sharks swimming in the world’s ocean. Yet when most people think of these cartilaginous … Find out about the worlds biggest and fastest sharks, how sharks … Sharks are a group of elasmobranch cartilaginous fishes characterized by a ribless endoskeleton, dermal denticles, five to … · shark, any of numerous species of cartilaginous fishes of predatory habit that constitute the order selachii (class … Sharks can rouse fear and awe like no other creature in the sea.