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.
The length of the hammerhead sharks measure around 0.9 â 6 meters (3.0 â 20 feet). The weight of these species is about 500 â 1,000 pounds. The hammerhead sharks normally exhibit light grey to greenish tint skin color. They have white bellies with larger hammer-like head that gives them a name of hammerhead shark.