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.
Yes it is true that sharks do in fact have very good eyesight. In fact, sharks can see extremely well in dark lighted areas, have fantastic night vision, and can see colours. Avoid wearing bright colours in the water, such as oranges and yellows, as sharks can indeed see them.