While some species, like the sperm whale, have better vision than others, most whales rely heavily on echolocation to navigate and hunt in the deep, dark ocean.
Here's why whales have poor eyesight:
* Limited light penetration: The depths where whales often forage are very dark.
* Evolutionary adaptation: Their reliance on echolocation meant that eyesight became less crucial for survival and may have even been a disadvantage in their environment.
Let me know if you'd like to learn more about echolocation!