In subsequent citations, only use the first author's last name followed by et al. in the signal phrase or in parentheses. (Kernis et al., 1993). In et al. , et should not be followed by a period.
Transcript of Hammerhead Shark Eyes. Structure of Eye. The structure of a hammerhead sharks eye is very similar to the human eye, they have a cornea, lens, retina, pupil and iris. Their retina has both cone and rod cells, which means they can see light, dark, and colours.
Hammerhead Shark Behavior. While most species of sharks are loners, the Hammerhead Sharks swim in schools during the daylight hours. These schools can have up to 100 members in them. At night time though they go to find food and they do that on their own.