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.
Smooth hammerhead sharks are found worldwide in temperate waters and are thought to be the hammerhead species most tolerant of temperate waters. They have also been observed in freshwaters habitats in Florida and Uruguay and in tropical waters.