Which one do you fear: Octopuses or Squids? The seven oceans contain thousands of organisms, which create an aquatic ecosystem. Some of these organisms are peaceful friends, but some are ruthless killers. Throughout the history of marine species, octopuses and squids have been described as monstrous creatures, which appear as homogeneous species, but they contrast with each other. Sharing various comparable traits and physical features, made it confusing for humans to organize them in the classification
Evolution of Hammerhead Sharks Hammerhead sharks are an interesting species of shark. They carry an odd appearance with their “hammer” shaped heads, which is much different than all other species of shark. Most scientists suggest that the earliest ancestor of hammerhead sharks appeared about twenty-million years ago in the Miocene Era. There were two other lineages of sharks that actually broke off from the hammerhead, the winghead shark and the bonnethead shark. Hammerheads are a smaller type of
The hammerhead sharks are excellent predators that belong to the order Carcharhiniformes and family Sphyrnidae. Members of this family of sharks have unique head structures that extends to form a hammer-shaped (T-Shaped) cephalofoil that have different functions including sensing, water maneuvering, and manipulating prey. This family has two genera; Eusphyra and Sphyrna. Hammerheads are distant relatives of the mid-Tertiary period carcharhinid sharks. Today, species of the hammerhead include Eusphyra