Fish eyes question

JoannaB

Well Known Member
Messages
1,895
Reaction score
70
Points
143
Experience
5 years
I am not sure where to post this. Moderators feel free to move it to appropriate sub forum.

My seven year old wants to know whether fish could use one eye to look forward or up while looking back or down with the other eye. And if the answer is that some fish can but others can't, we want to know which fish can.

Thank you!
 

Jaysee

Fishlore Legend
Messages
17,434
Reaction score
247
Points
298
Experience
5 to 10 years
Some fish can, some fish can't. Form follows function, so you can get an idea by examining the eyes. The more binocular their vision (forward facing eyes) the less likely they can move them independently. Many fish have their eyes on the side of the head though, which means that they do not have binocular vision. Like a flat screen TV, they have a wide viewing angle for each eye which allows them to have a wider field of vision, though they have a hole directly in front of them. Fish that have this "split vision" are able to move their eyes independently.
 

kinezumi89

Fishlore VIP
Messages
6,478
Reaction score
119
Points
308
Experience
3 years
Generally prey species have eyes on the sides of their heads (think rabbits and deer) so that they can have the widest-range view possible to keep a lookout for predators, while predators (think wolves and lions) have more telescopic vision so they can see prey more clearly.
 

Matt B

Well Known Member
Messages
3,256
Reaction score
45
Points
143
Experience
Just started
Generally prey species have eyes on the sides of their heads (think rabbits and deer) so that they can have the widest-range view possible to keep a lookout for predators, while predators (think wolves and lions) have more telescopic vision so they can see prey more clearly.
And judge distance to said prey.
 

Jaysee

Fishlore Legend
Messages
17,434
Reaction score
247
Points
298
Experience
5 to 10 years
Telescopic is seeing clearly from far away - binocular is the eyes working together, which is needed for depth perception. Both are important for predators.
 
  • Thread starter
  • Thread Starter
  • #9

JoannaB

Well Known Member
Messages
1,895
Reaction score
70
Points
143
Experience
5 years
I thought most didn't have eyelids!
From what I read the cories "blinking" is not like ours. They don't close eyelids, but rather they roll their eyes to point inside their head.
 

Jaysee

Fishlore Legend
Messages
17,434
Reaction score
247
Points
298
Experience
5 to 10 years
The eyes of tuna are flush with the body, so that the fish is perfectly streamlined from nose to tail. If you were to rub your hand over it's eye, you would not feel any difference from the head/body.

Random fish eye fact
 
Last edited:
Toggle Sidebar

Aquarium Calculator

Follow FishLore!





Top Bottom